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Pressure-Relief-Valve
Pressure Relief Valve

Pressure Relief Valve

The Pressure Relief Valve provides critical protection against over-pressurisation within sanitary process piping systems. Constructed from high-quality forged stainless steel, these valves ensure safe and reliable operation while maintaining full hygienic compliance. Designed with an open yoke for easy cleaning, a polished self-draining body, and 3A approval, the 70 Series is ideal for safeguarding sensitive process lines without compromising sanitary standards.

  • Dairy, Food & Beverage
  • Pharmaceutical
  • Cosmetics & Personal Care
  • Chemical & Industrial
Design & Construction

The 70 Series Pressure Relief Valve uses an adjustable spring-loaded design to maintain system pressure. When line pressure exceeds the pre-set limit, the valve plug lifts, venting excess pressure through a side outlet. The valve automatically reseats once the pressure returns below the setpoint.

  • Body Material: Forged AISI 316L Stainless Steel (also available in 304L)
  • Seat Seal: EPDM (standard)
  • Seal Ring: PTFE
  • Lip Seal: PTFE
  • Surface Finish: Ra ≤ 23 μin (180 grit) for hygienic applications
  • Self-Draining Design: Eliminates residue build-up
  • Open Yoke Construction: Facilitates fast and thorough cleaning of the valve plug
Technical Specifications

 

Feature Specification
Size Range 1″ to 2″
End Connections Sanitary Clamp
Body Material 316L Stainless Steel (optional 304L)
Seal Material EPDM (seat), PTFE (seal ring and lip seal)
Surface Finish Ra ≤ 23 μin (180 grit)
Min. Blow-Off Pressure 5 PSI (0.35 bar)
Max. Blow-Off Pressure 75 PSI (5 bar)
Temperature Range -51°C to +149°C
Certifications 3A Approved
Key Features
  • Adjustable Spring Force: Enables precise blow-off pressure settings from 5 PSI to 75 PSI
  • Polished, Self-Draining Body: Designed for sanitary environments, preventing product retention
  • Open Yoke Design: Allows visual inspection and easy cleaning of the valve plug
  • Fully Forged Construction: High strength and superior resistance to corrosion
  • Sanitary Clamp End Connections: Ensures quick and secure installation and removal
Operation

Once the process line exceeds the pre-set pressure threshold, the valve plug lifts to release the excess pressure through the side port. The valve will remain open until system pressure drops below the setpoint, after which the spring force reseats the plug, resealing the system automatically. This simple and effective mechanism ensures that sensitive equipment and piping systems are protected from damage due to over-pressurisation.