Products Archive - John Clark

General Valves

From Control Valves to Safety Relief Valves

Y Type Strainers
Basket Strainers
Gauges
Needle Valves
Wafer Check Valves
Instrumentation Valves
General Process Ball Valves
Fire Hydrant Valves
Solenoid Valves
Brass/Bronze Valves
Knife Gate Valves
Plug Valves
Diaphragm Valves
Regulators
Traps
Relief Valves
Blow Down Valves
Pressure Reducing
Pinch Valves
Plastic Valves
Control Valves

General Valves: Ensuring Optimal System Performance

At JCV, our general valves are engineered to regulate and control the flow of gases and liquids across various industrial applications. Whether managing system pressure or directing fluid flow, our valves are designed to maintain operational integrity and efficiency. Available in materials like carbon steel, stainless steel, and brass, they cater to diverse requirements, ensuring durability and compatibility with different media. From solenoid valves to control valves, our range supports both gas service and liquid service, providing reliable solutions for complex systems.

Pressure Relief Solutions: Safeguarding Equipment and Personnel

Understanding the critical nature of overpressure scenarios, JCV offers a suite of pressure relief devices, including pressure relief valves, safety valves, and safety relief valves. These components are vital for protecting pressure vessels and pipelines from excess pressure, thereby preventing potential equipment failure. Our valves are meticulously calibrated to specific set pressures, ensuring they activate precisely when needed to maintain safe operating pressures. By adhering to the Pressure Equipment Directive (PED), we guarantee compliance with international safety standards.

Advanced Features for Enhanced System Control

Our valves are designed with features that address the dynamic needs of modern systems. Incorporating elements like diaphragms, seals, and precise inlet configurations, they ensure optimal performance under varying conditions. Whether dealing with temperature fluctuations or pressure surges, our valves respond effectively to maintain system stability. The integration of control mechanisms allows for fine-tuned adjustments, catering to specific application requirements. This adaptability is crucial for industries where maintaining exact temperature and pressure parameters is essential.

Commitment to Quality and Continuous Improvement

JCV is dedicated to providing not only high-quality products but also ongoing support and information. Our commitment extends beyond the sale, offering expert valve advice straight to your team to ensure optimal usage and maintenance. We encourage clients to sign up to receive updates, granting access to our latest innovations and insights. By staying informed, you can proactively address system needs, prevent equipment failure, and adapt to pressure increases effectively.

Frequently Asked Questions (FAQs):

What types of media are JCV's general valves suitable for?

Our general valves are designed for both gas and liquid applications, ensuring versatile performance across various industries.

How do I determine the appropriate set pressure for a relief valve?

The set pressure should align with your system’s maximum allowable working pressure. Consulting with our experts can help you select the correct valve to prevent overpressure situations.

Are JCV's valves compliant with international safety standards?

Yes, our valves meet the requirements of the Pressure Equipment Directive (PED), ensuring they adhere to stringent safety and quality standards.

Can I receive updates on new products and industry insights?

Absolutely! Sign up to receive our newsletters and gain access to our latest product releases, technical articles, and expert advice delivered straight to your inbox.

What materials are used in the construction of JCV's valves?

We utilise high-quality materials such as carbon steel, stainless steel, and brass to ensure durability and compatibility with various system requirements.

How does upstream pressure affect valve performance?

Upstream pressure plays a crucial role in how a valve operates. It influences the force required to open the valve and impacts flow regulation. Our valves are designed to manage varying upstream conditions, ensuring stable system performance and safe pressure control.

What is the difference between safety relief and overpressure protection?

Safety relief refers to the valve mechanism that automatically discharges pressure to prevent failure. Overpressure protection is the broader safety strategy, including safety relief valves, that safeguards systems from dangerous pressure increases. JCV’s range offers both precise relief and comprehensive protection.

Valve Overhaul & Accessories

Accessories

Complete valve interlock service – from site survey to installation and servicing
From a single lock to a complete safety relief valve system and more.
Portable valve actuator systems
Remote Cable drive operators
Valve torque limiting devices

Valve Overhaul And Refurbishment Service

JCV offer a complete valve overhaul and refurbishment service, which includes:

The valve is firstly identified and tagged as part of our QA procedure.
Strip & inspect, reporting any adverse findings to customer.
Each individual component is then shot blasted, cleaned/polished
Where applicable the body and seats are then lapped.
Final inspection of all components before re-assembly procedure.
The valve is then tested to the relevant British, American or DIN standard.
Finally the valve is painted and the Test Certification prepared (where requested)

Comprehensive Valve Accessories for Enhanced System Performance

JCV offers a wide range of accessories designed to complement and enhance the functionality of various valve types, including butterfly valves, globe valves, and pressure relief valves. These accessories are essential for ensuring optimal operation, safety, and longevity of your industrial valves. Whether you’re dealing with gas, oil, or other process media, our accessories are engineered to withstand demanding conditions, reducing the risk of equipment failure and ensuring consistent flow control.

Expert Valve Overhaul and Repair Services

Understanding the critical role valves play in industrial processes, JCV provides expert valve overhaul and valve repair services. Our comprehensive approach includes thorough inspection of valve components, identification of wear or corrosion, and precise adjustments to restore optimal performance. By addressing issues proactively, we help extend the service life of your valves, minimise downtime, and maintain system safety and efficiency.

Rigorous Testing to Ensure Reliability

To guarantee the reliability of your valves, JCV conducts meticulous hydraulic testing and pneumatic testing procedures. These tests are carried out in accordance with industry standards to assess the integrity and performance of valves under various pressure conditions. Our testing processes help determine the suitability of valves for specific applications, ensuring they can handle the required pressure and flow rates without compromising safety.

Detailed Reporting and Ongoing Support

Transparency and continuous improvement are at the core of JCV’s services. After each inspection, overhaul, or testing procedure, we provide a detailed report outlining the findings, actions taken, and recommendations for future maintenance. This documentation is invaluable for maintenance planning and risk management. Our team is always available for contact to discuss any concerns or to schedule further service interventions, ensuring your systems remain in peak condition.

Frequently Asked Questions (FAQs)

What types of valves can JCV service?

JCV services a wide range of valve types, including butterfly valves, globe valves, and pressure relief valves, catering to various industrial applications.

How does JCV conduct valve testing?

We perform both hydraulic testing and pneumatic testing to assess valve performance under different pressure conditions, ensuring they meet operational requirements.

What is included in a valve overhaul service?

Our valve overhaul service includes disassembly, thorough inspection of valve components, cleaning, repair or replacement of worn parts, reassembly, and final testing to ensure optimal performance.

How can I prevent equipment failure related to valves?

Regular inspection, maintenance, and timely repair of valves, along with proper installation and use of appropriate accessories, can significantly reduce the risk of equipment failure.

Does JCV provide documentation after servicing valves?

Yes, we provide a comprehensive detailed report after each service, outlining the work carried out, findings, and recommendations for ongoing maintenance.

What does a comprehensive service from JCV typically include?

A comprehensive service from JCV typically includes full valve disassembly, manual inspection of all critical components, cleaning, necessary repairs or replacements, reassembly, and final hydraulic or pneumatic testing. This thorough approach ensures your valve systems are restored to optimal performance and reliability.

Can valve adjustments be carried out manually on site?

Yes, many valve adjustments can be done manually on site by trained technicians. For more complex cases or for a comprehensive service, we recommend sending the valve to our specialist facility to ensure all elements are properly inspected, repaired, and tested.

How do pressure relief valves protect equipment in high-pressure systems?

Pressure relief valves are critical safety devices that automatically release excess pressure from a system to prevent equipment damage or failure. They help maintain safe operating conditions by opening at a preset pressure point, ensuring consistent protection in industrial and process environments.

When should I consider professional valve repair services?

You should consider professional valve repair when valves show signs of leakage, reduced performance, corrosion, or irregular operation. Early intervention can prevent more serious issues, extend the valve’s service life, and reduce the risk of equipment failure in your system.

What industries commonly use industrial valves from JCV?

JCV supplies industrial valves to a wide range of sectors, including oil, gas, chemical processing, water treatment, and manufacturing. Our valves are built to withstand demanding conditions and ensure reliable flow, pressure, and safety control across various applications.

Actuation

Complete Actuation Packages

At John Clark Valves Ltd, we provide complete valve actuation packages engineered for performance, reliability, and control. Our extensive range includes electric, electro-hydraulic, hydraulic, and pneumatic actuators, suitable for all valve sizes, pressure classes, and operating environments across industries such as oil and gas, petrochemical, and power generation.

We supply quarter-turn, multi-turn, and modulating actuation solutions, each designed to deliver precise operation and long service life. Every package can be customised using carbon steel, low-temperature carbon steel, or stainless-steel components, with full integration of ancillary equipment such as solenoid valves, switchboxes, positioners, gearboxes, manual overrides, and spring-return units.

Whether you require manual to fully automated actuation, we deliver tailored solutions that ensure seamless control, operational safety, and efficiency.

Speak to our technical team today to discuss your actuation requirements or request a quotation for your next project.

Complete Actuation packages

At John Clark Valves Ltd, we supply valve actuators designed to deliver reliable control, precise movement, and long-term performance across demanding industrial environments. Our complete actuation packages support full valve automation, allowing you to operate valves safely, efficiently, and consistently across a wide range of applications.

We work with electric, pneumatic, hydraulic, and electro-hydraulic actuators, suitable for small valves through to larger valves, across all pressure ratings. Our valve solutions integrate seamlessly with butterfly valves, ball valves, globe valves, and control valves used throughout oil and gas, petrochemical, power generation, and process industries.

Electric Actuators

Electric actuators provide dependable operation where accurate positioning and repeatable control matter most. An electric valve actuator uses an electric motor as its power source to move the valve stem and control valve position with precision.

Most electric actuators connect directly into a wider control system, responding to a control signal that opens, closes, or modulates the valve as required. Integrated limit switches and position feedback ensure consistent movement and reliable operation throughout the full operating range. These actuators suit applications where compressed air is unavailable or where fine control and steady performance are essential.

Pneumatic Actuator Solutions

A pneumatic actuator uses compressed air to generate force and operate the valve. This method offers fast response times, robust performance, and high reliability in harsh or hazardous environments.

Pneumatic valve actuators work particularly well with quarter turn valves and linear motion applications, making them suitable for both isolation and control duties. Stable air pressure and a consistent air supply allow the actuator to operate smoothly, maintaining accurate valve position even when process conditions change.

Pneumatic Valve Actuators and Valve Movement

Pneumatic valve actuators support both rotary and linear valve movement, depending on the valve design. Rotary pneumatic actuators commonly operate butterfly and ball valves, while linear actuators suit rising stem valves, plug valves, and diaphragm-based control valves.

These actuators convert air applied to controlled mechanical movement, ensuring the valve opens, closes, or modulates in the same way during every cycle. When paired with a positioner, the actuator maintains precise control across varying pressure and flow conditions.

Double Acting, Spring Return, and Fail-Safe Operation

Actuators can be configured as double acting or single acting depending on how the valve must operate. A double acting actuator applies air pressure in both directions, delivering consistent torque and controlled movement throughout the stroke.

Spring return designs use stored spring force to move the valve to a predefined position during power failure or air loss. This fail-safe function ensures the valve moves to a safe position, either fail open or fail closed, protecting the system and maintaining safe operation.

Actuator Design and Common Types

There are two main types of valve actuators used across industrial applications: electric and pneumatic. Within these, several common types exist, including piston actuators, diaphragm actuator designs, vane actuators, and scotch yoke mechanisms.

Each actuator type offers different torque characteristics, force output, and movement profiles. Selection depends on valve size, pressure conditions, required speed, and control accuracy. Choosing the correct design ensures reliable operation and extends the service life of both the actuator and the valve. We can supply actuators that suit all types of valves, including forged valves and cast steel valves.

Complete Actuation Packages

Our complete actuation packages combine the valve, actuator, and all associated equipment into a single, integrated assembly. This includes solenoid valves, positioners, switches, manual overrides, and air preparation equipment where required.

By supplying fully assembled and tested packages, we reduce installation time, improve system compatibility, and ensure dependable performance from day one. Each package supports smooth operation, accurate control, and long-term reliability across your system.

Why Choose John Clark Valves Ltd

You benefit from technical expertise, proven actuator manufacturers, and tailored solutions designed around your application. We support projects from specification through to supply, helping you achieve reliable valve automation across pressure, flow, and operating conditions.

Speak to our technical team today

If you need valve actuators, electric actuators, pneumatic valve actuators, or fully engineered actuation packages, contact John Clark Valves Ltd today. We’ll help you specify the right solution and deliver dependable performance for your next project.

Quarter turn / Multi-turn / modulating etc
Suitable for all size/pressure ranges of valve
Carbon Steel, Low Temp Carbon Steel, and Stainless Steel

All associated ancillary equipment

Solenoid Valves
Switchboxes / Positioners
Gearboxes / Manual over rides
Manual spring return units

Butterfly Valves

Full range of Butterfly Valves to API 609

Size range ½” to 48”
Concentric / Double Offset / Triple Offset
Up to ANSI Class 600, PN10 to PN40
Carbon Steel, Low Temp Carbon Steel, and Stainless Steel
Other material grades including Alloy and Duplex Steels upon request
Additional Testing RT, MT, DP, PMI Ect and Special Metallurgy available
Firesafe certification to API 607 / ISO 10497 / BS 6755 Pt. 2

Materials:		Cast Iron, Ductile Iron, WCB, LCB, LCC, CF8M, CF3M
Design:		API 609 Face to Face: API609, BS EN 558, DIN3202, ISO 5752 Firesafe Certified to API607/EN ISO 10497 SIL 3 Rated – for functional safety Directive 94/9/EC for Explosive atmospheres (ATEX) Pressure equipment directive 97/23/EC (PED)
Testing:		API 598 / EN 12266-I
Design Options:		Wafer Pattern, Lugged & Tapped, Double Flanged
Seat Materials:		Phenolic-backed Rubber – NBR, EPDM, Viton, Neoprene, Hypalon, Silicon, PTFE

High Performance Butterfly Valves by John Clark Valves

Butterfly valves play a vital role in fluid control systems, offering an economical and efficient way to regulate flow across different industries. Designed with a simple quarter-turn mechanism, these valves make it easy to open, close, or adjust the flow in pipelines. At the core of the design is a rotating disc that controls fluid movement within the valve body. Known for their durability and precision, high-performance butterfly valves are widely used in industries where reliability is essential. John Clark Valves provides a range of butterfly valves made from materials such as ductile iron with EPDM seats, ensuring suitability for applications in water treatment, food production, and chemical processing.

Our butterfly valves are available in wafer, lugged, and flange-mounted configurations, allowing flexibility for different system setups. They can be operated manually with a lever, through a gearbox, or with electric actuation, making them adaptable to various industrial needs. The design also ensures easy installation and maintenance, reducing downtime while extending the valve’s service life. Compared to other valve types, such as ball valves, butterfly valves offer a cost-effective alternative without compromising on efficiency or performance.

One of the biggest advantages of butterfly valves is their ability to provide secure sealing and accurate flow control. Whether fully open or partially closed, they regulate pressure and fluid movement effectively. The seat and disc are designed to handle different pressure ratings, ensuring reliable performance in various conditions. For potable water applications, WRAS-approved butterfly valves are available, meeting strict industry regulations. Their lightweight, compact build makes them easy to install and handle across different pipeline sizes.

John Clark Valves offers a comprehensive selection of butterfly valves to meet a wide range of industrial requirements. From standard wafer-type valves to tapped and lugged designs, each product is built for specific operational demands. Whether used for regulation or isolation, our butterfly valves enhance system efficiency with their robust construction and high-quality materials. Designed for longevity and dependable performance, they provide a cost-effective solution for industries requiring durable flow control equipment.

Frequently Asked Questions:

What are the advantages of butterfly valves over ball valves?

Butterfly valves are more affordable, lighter, and take up less space than ball valves, making them ideal for large pipelines and applications that require quick quarter-turn operation.

Which industries use butterfly valves?

These valves are commonly found in food and beverage processing, water treatment, chemical plants, and HVAC systems due to their efficiency and adaptability.

How do butterfly valves control flow?

They regulate flow by rotating a disc within the valve body. When fully open, they allow maximum fluid movement; when partially closed, they restrict flow; and when shut, they completely isolate the pipeline.

What types of butterfly valves are available?

Butterfly valves come in wafer, lugged, and flange-mounted designs, using materials such as ductile iron, EPDM, and stainless steel to accommodate different pressures and applications.

Can butterfly valves handle high-pressure applications?

Yes, high-performance models are built to withstand elevated pressure levels with reinforced seats and strong sealing mechanisms, making them suitable for demanding industrial settings.

What is the pressure rating of a butterfly valve?

The pressure rating of a butterfly valve indicates the maximum pressure it can safely handle in operation. This varies based on the valve’s design, materials, and intended use. For example, high-performance butterfly valves are typically rated for higher pressures and more demanding conditions, while standard models are suited for lower-pressure applications like water treatment and HVAC systems.

What does API 609 mean for butterfly valves?

API 609 is the industry standard that defines the design, testing, and performance requirements for butterfly valves used in industrial applications. Valves that meet API 609 standards are built to ensure reliable sealing, proper flow control, and durability under various pressure and temperature conditions. Choosing a butterfly valve compliant with API 609 ensures it is manufactured to a recognised quality benchmark.

How does the rotation of a butterfly valve control flow?

Butterfly valves operate with a quarter-turn rotation, meaning the disc moves 90 degrees from fully open to fully closed. When supplied in a fully open position, the valve allows unrestricted flow. Partial rotation reduces flow, while a full 90-degree turn closes the pipeline completely. This simple mechanism makes butterfly valves efficient and easy to operate, whether manually controlled or equipped with an actuator.

Forged Steel Valves – Tocina ES

Forged Steel Gate Valves

Full range of Forged Steel Gate Valves to API 602 / EN ISO 15761 / BS5352

Standards to API 602 / EN ISO 15761 / BS5352
Size range ½” to 2”
ANSI Class 150 to 2500
Carbon Steel, Low Temp Carbon Steel and Stainless Steel available from stock
Other materials including Alloy and Duplex Steels upon request
Special designs including High Temp and Cryogenic valves also available
By Pass, Locking Devices, Lever & Weight,

Forged Gate Valves ANSI Ratings:
150LB	300LB	600LB	900LB	1500LB	2500LB
½” – 2″	½” – 2″	½” – 2″	½” – 2″	½” – 2″	½” – 2″

Materials:		A105N, LF2, F1, F5, F9, F11, F22, F44, F51, F53, F55, 304/L, 316/L, 321, 347, Monel, Inconel, Hastelloy
Design:		API 602 / EN ISO 15761 / BS5352
Testing:		API 598 / ISO 5208
Design Options:		Threaded, Socket Weld, Flanged, Butt weld, Full and Reduced Bore, Bolted and Welded

Forged Steel Globe Valves

Full range of Forged Steel Globe Valves to API 602 / EN ISO 15761 / BS5352

Standards to API 602 / EN ISO 15761 / BS5352
Size range ½” to 2”
ANSI Class 150 to 2500
Carbon Steel, Low Temp Carbon Steel and Stainless Steel available from stock
Other materials including Alloy and Duplex Steels upon request
Special designs including High Temp and Cryogenic valves also available
By Pass, Locking Devices, Lever & Weight,

Forged Gate Valves ANSI Ratings:
150LB	300LB	600LB	900LB	1500LB	2500LB
½” – 2″	½” – 2″	½” – 2″	½” – 2″	½” – 2″	½” – 2″

Materials:		A105N, LF2, F1, F5, F9, F11, F22, F44, F51, F53, F55, 304/L, 316/L, 321, 347, Monel, Inconel, Hastelloy
Design:		EN ISO 15761 / BS5352 / ANSI B16.34
Testing:		API 598 / ISO 5208
Design Options:		Threaded, Socket Weld, Flanged, Butt weld, Full and Reduced Bore, Bolted and Welded Bonnet

Forged Steel Check Valves

Full range of Forged Steel Check Valves to API 602 / EN ISO 15761 / BS5352

Standards to API 602 / EN ISO 15761 / BS5352
Size range ½” to 2”
ANSI Class 150 to 2500
Carbon Steel, Low Temp Carbon Steel and Stainless Steel available from stock
Other materials including Alloy and Duplex Steels upon request
Special designs including High Temp and Cryogenic valves also available
By Pass, Locking Devices, Lever & Weight,

Forged Gate Valves ANSI Ratings:
150LB	300LB	600LB	900LB	1500LB	2500LB
½” – 2″	½” – 2″	½” – 2″	½” – 2″	½” – 2″	½” – 2″

Materials:		A105N, LF2, F1, F5, F9, F11, F22, F44, F51, F53, F55, 304/L, 316/L, 321, 347, Monel, Inconel, Hastelloy
Design:		EN ISO 15761 / BS5352 / ANSI B16.34
Testing:		API 598 / ISO 5208
Design Options:		Piston, Swing & Ball, Threaded, Socket Weld, Flanged, Butt weld, Full and Reduced Bore, Bolted and Welded Bonnet

Forged Steel Valves for Industrial and Marine Applications

At John Clark Valves, we offer an extensive range of forged steel valves, designed to withstand extreme pressure and temperature variations. Our product lineup includes steel gate valves, steel globe valves, and steel check valves, all engineered for reliability in demanding environments. Whether for industrial process applications, marine applications, or shipside duties, our forged steel valves provide exceptional durability and performance. With end connections available in NPT or socket weld, BSP NPT or socket, our valves are versatile and suitable for various installation needs.

Our steel gate valves are designed for full, unobstructed flow and minimal pressure drop, making them ideal for isolation applications. Featuring a rising stem and a durable bonnet construction, these valves are perfect for high-pressure and high-temperature environments. The steel globe valve, with its precision-engineered disc mechanism, offers superior control over flow regulation. Meanwhile, our steel check valves effectively prevent backflow, ensuring system integrity across diverse applications.

Manufactured to strict industry standards, our forged steel valves are built to withstand temperatures ranging from -29°C to 425°C. They are suitable for handling steam, pressure, and high-temperature process fluids, making them ideal for industrial and marine sectors. With a variety of sizes available, we can meet the specific demands of your operations. Our valves come with the necessary approvals to guarantee performance and compliance in critical environments.

Stay up to date with our latest updates and best offers by signing up for our newsletter. Sign up to receive expert valve advice straight to your inbox, ensuring you have access to our latest product developments and industry insights. For more information, contact our team today or request a quote through our website. Find the right valve for your needs and explore our valves online for comprehensive solutions.

Frequently Asked Questions (FAQs):

What are the benefits of using forged steel valves over cast iron valves?

Forged steel valves offer superior strength, durability, and resistance to high-pressure and high-temperature conditions compared to cast iron valves. They are also less prone to cracking and provide better performance in critical industrial and marine applications.

From Control Valves to Safety Relief Valves

General Valves: Ensuring Optimal System Performance

Pressure Relief Solutions: Safeguarding Equipment and Personnel

Advanced Features for Enhanced System Control

Commitment to Quality and Continuous Improvement

Frequently Asked Questions (FAQs):

Accessories

Valve Overhaul And Refurbishment Service

Comprehensive Valve Accessories for Enhanced System Performance

Expert Valve Overhaul and Repair Services

Rigorous Testing to Ensure Reliability

Detailed Reporting and Ongoing Support

Frequently Asked Questions (FAQs)

Complete Actuation Packages

Complete Actuation packages

Electric Actuators

Pneumatic Actuator Solutions

Pneumatic Valve Actuators and Valve Movement

Double Acting, Spring Return, and Fail-Safe Operation

Actuator Design and Common Types

Complete Actuation Packages

Why Choose John Clark Valves Ltd

Speak to our technical team today

Butterfly Valves

High Performance Butterfly Valves by John Clark Valves

Frequently Asked Questions:

Forged Steel Gate Valves

Forged Steel Globe Valves

Forged Steel Check Valves

Forged Steel Valves for Industrial and Marine Applications

Frequently Asked Questions (FAQs):

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