The Parker VR7 Series is a relief valve that’s designed to vent excess pressure from a regulator should a minor seat leak occur. This valve serves as a highly economical way of protecting the regulator and outlet pressure gauge and is not intended for applications where repeated or frequent venting is required. It is available in stainless steel.

The VR7 Series is suitable for use with both inert and corrosive gases. It is available with variety of connections to ensure compatibility with a broad range of pressure regulators. Seals are available in FKM or FFKM for compatibility with different process media and operating temperature ranges. Pressure ranges of the VR7 Series relief valve are also adjustable to meet the unique requirements of the operation. In situations where gas cannot be vented to atmosphere, the outlet of the relief valve can be connected to an external tubing line.

All VR7 pressure relief valves are cleaned for O2 service to ensure performance and reliability in high-purity applications where cleanliness is critical. 

Markets:
• Analytical Laboratory
• Pharmaceutical
• BioPharm
• Aerospace
• Industrial

Features and Benefits:
• 1/4 inch face seal female
• Provides protection of regulators if a seat leak occurs
• Operating temperatures range: -30°C to +400°F (-35°C to 204°C)
• Maximum operating pressure: 750 psig
• Choice of seal materials to ensure system compatibility
• Hex body provides wrench flats
• Available with a variety of connections
• Poppet options: PCTFE or brass
• Screw options: 316 Stainless steel or Delrin
• Flow capacity 0.37 Cv
• Adjustable pressure ranges to meet the needs of specific applications

Applications:
• Corrosive and specialty gases
• Gas sample preparation
• Gas cabinets
• Valve manifold boxes (VMB)
• Upstream process lines