In industrial environments where pressurized systems are part of daily operations—such as power generation, chemical processing, oil and gas, and manufacturing—safety is paramount. A small failure in a pressure system can lead to equipment damage, production loss, environmental hazards, or even catastrophic accidents.

That’s where safety relief valves come in—and at T & W Valve and Machine Company, we ensure these critical components are installed and maintained with the highest standards of precision and reliability.

What Are Safety Relief Valves?

Safety relief valves are designed to automatically release excess pressure from a pressurized system, such as a boiler, pressure vessel, or pipeline. They serve as a last line of defense, preventing overpressure that could otherwise lead to explosions or severe mechanical failure.

These valves are typically categorized into:

• Safety valves – Used in steam, gas, or vapor applications. They “pop” open quickly at a set pressure.
• Relief valves – Used primarily in liquid systems. They open more gradually to relieve pressure.

Some valves are dual-purpose, handling both gases and liquids depending on the application. Regardless of type, their function is the same: maintain system integrity and safety by releasing pressure when needed.

Proper Installation Matters

At T & W Valve and Machine Company, we understand that proper installation is crucial to a valve's performance and reliability. Our technicians follow best practices and code requirements for every valve we install.

Key Installation Factors:

1. Correct Positioning
   Safety relief valves must be installed in a vertical, upright orientation, typically near the top of a vessel or pipeline to prevent fluid buildup and ensure proper flow when venting.
2. Set Pressure and Sizing
   We help determine the correct set pressure—the exact point at which the valve opens—based on the system’s maximum allowable working pressure (MAWP). The valve must also be sized properly to handle the expected discharge flow without delay.
3. Discharge and Drainage
   Proper discharge piping is essential to safely direct vented fluids or gases away from personnel and equipment. We ensure minimal backpressure, and where needed, install drains to prevent condensation or accumulation.
4. Isolation and Accessibility
   While isolation valves can be used, we ensure they are locked and tagged open to prevent unintentional blockage of the safety device.

Every installation is fully documented and completed to ASME, API, OSHA, and local code standards.

Comprehensive Service and Repair

Like any precision mechanical device, safety relief valves require routine maintenance to stay reliable. Debris, corrosion, thermal cycling, and mechanical wear can all impact a valve’s performance. Our experienced team offers full-service repair, testing, and recertification for valves of all types, sizes, and manufacturers.

Our Proven Service Process Includes:

1. Initial Inspection
   Each valve undergoes a thorough inspection to identify visible wear, corrosion, pitting, or damage. We verify nameplate data, pressure settings, and application-specific considerations.
2. Pressure Testing
   Valves are tested on calibrated test stands to verify performance. We check the valve’s pop-off (for gas/steam) or crack pressure (for liquid), ensuring it activates precisely as specified.
3. Disassembly and Cleaning
   Components such as springs, guides, nozzles, and seats are carefully removed, cleaned, and examined. Contamination or worn parts can affect a valve’s ability to reseal properly.
4. Component Repair or Replacement
   We machine or lap valve seats and sealing surfaces to restore like-new condition. Springs, seals, and gaskets are replaced with OEM-quality or better components as needed.
5. Reassembly and Calibration
   The valve is reassembled and adjusted to meet the precise set pressure. Calibration is verified with testing, ensuring consistent and repeatable operation.
6. Final Testing and Certification
   After repair, valves are re-tested and documented. Each unit receives a test tag and certification report, confirming it meets safety and performance standards.

Brands and Applications We Support

T & W Valve and Machine Company services all major makes and models of safety relief valves, including:

• Crosby
• Kunkle
• Consolidated
• Anderson Greenwood
• Farris
• And many more

Our valves are used across a wide range of industries and applications—from high-pressure steam lines and boiler systems to chemical reactors, hydraulic units, and compressed air systems.

Why T & W Valve and Machine Company?

With decades of industry experience, T & W Valve and Machine Company is trusted by power plants, refineries, manufacturers, and utilities for reliable, high-quality safety valve solutions. We combine:

• A fully equipped machine shop for in-house repair
• Mobile service units for on-site testing and certification
• Factory-trained technicians
• Strict compliance with safety and quality standards

Stay Safe, Stay Compliant

When it comes to safety relief valves, failure is not an option. Regular testing and professional servicing are not just best practices—they’re regulatory requirements that protect lives, equipment, and investments.

Trust T & W Valve and Machine Company to handle your valve needs with accuracy, expertise, and a focus on safety.

Contact us today to schedule a service, inspection, or installation consultation.