Control Devices ST25-1A200 Safety Relief Valve 200 Psi

Product Description

The CONTROL DEVICES ST25-1A200 is an ASME-rated safety relief valve designed to protect pressurized systems from overpressure conditions. It features a 1/4 inch MNPT inlet, a brass body, and a fluorocarbon seal rated for service from -15 degrees F to 250 degrees F. The valve is set to relieve at a maximum working pressure of 200 psi and provides a flow capacity of 178 CFM. Licensed plumbers, HVAC technicians, and mechanical contractors install this valve as a safety device on compressed air systems, pressure vessels, and related pressurized equipment where ASME compliance is required.

This valve is suited for light-duty compressed air and pressure vessel applications in both residential and light commercial settings. Its 1/4 inch MNPT connection makes it compatible with standard NPT-threaded pipe and fittings. The fluorocarbon seal material provides resistance to a range of media and temperatures, supporting reliable service across the rated temperature range. Contractors select this valve when an ASME-listed relief device is needed in a compact, threaded-body configuration.

Key Features

• ASME-rated safety relief valve for overpressure protection
• 200 psi maximum working pressure
• 178 CFM flow capacity
• 1/4 inch MNPT inlet connection
• Brass body with fluorocarbon seal for durability and media compatibility
• Rated from -15 degrees F to 250 degrees F operating temperature range

Compatibility

Designed as an OEM-style replacement safety relief valve for pressurized systems requiring a 1/4 inch MNPT connection and ASME-listed overpressure protection up to 200 psi.

Installation Notes

Installation should be performed by a licensed plumber or qualified mechanical contractor in accordance with applicable local codes and ASME pressure vessel requirements. Depressurize and isolate the system completely before removing or installing any relief valve. Do not plug, cap, or restrict the discharge port of the valve at any time during or after installation. Thread sealant compatible with the system media should be applied to male threads per standard piping practice.