Sanitary Vacuum Breaker, Adjustable Sanitary Tank Vacuum & Pressure Relief Valve

Reference: SV-9D, New Design
Sizes available: 1"-4" (DN25-DN100)
End connection: sanitary tri-clamp, butt-weld, thread
Body material: ASTM 304 (1.4301), 316L (1.4404)
Seal material: EPDM or Viton (FPM)
Positive pressure: 7.3-29psi (0.5-2 bar)
Negative pressure (vacuum): 4.35-13psi (0.3-0.9 bar)
Pressure adjustable: screw clockwise or anti-clockwise to increase or decrease pressure
Temperature range: -22°F to 266°F (-10℃ to 130℃)
Surface Finish: Ra 16-32µin (0.4-0.8µm), Ra 32µin as default.


SV-9D series is a new designed Sanitary Vacuum Breaker for pressure vessels or pipe systems, this kind of pressre relief valve has two functions:

● From the Pressure side, when the valve is normally closed and the tank pressure exceeds the rated pressure (set at 14.5psi/1bar as default) on the outside of the valve, the valve automatically opens and vents air to atmosphere.

● From the Vacuum side, when the valve is normally closed and there is vacuum in the tank (set at -13psi/-0.9bar as default) , the vacuum piston inside the valve opens automatically and draws air into the tank. In return, this keeps the pressure inside and outside the tank balanced.


To ajust PRV pressure relief, use a tri-clamp Tee with gas inlet on one port, pressure gauge and PRV on other 2 port. Wear protect eyeware or face sheild. Set the gas inlet to the desired relief pressure and validated with pressure gauge reading. Adjust with a 3/8″ drive rachet wrench so gas is just leaking out at the desired pressure.


Body Material ASTM 304 (1.4301), 316L (1.4404)
Seal Material EPDM or Viton (FPM)
End Connections butt-weld, sanitary tri-clamp, thread
Working pressure: 7.3-29psi  (0.5-2 bar),  set pressure at 14.5psi (1bar) as default
Vacuum 4.35-13psi  (0.3-0.9 bar),  set pressure at 13psi (0.9bar) as default.
Temperature range -22°F to 266°F (-10℃ to 130℃)
Internal Finish Ra 16 ~ 32µin (0.4 ~ 0.8µm), Ra 32µin as default.
External Finish Ra 16 ~ 32µin (0.4 ~ 0.8µm), Ra 32µin as default.


● Pressure can be modified per customers’ requirement.
● 100% inspected and pressure tested before shipping.
● Hygienic design, 100% stainless Steel, all springs SS304.
● Tri Clamp fitting


Drawing - Sanitary Vacuum Breaker


    Our sales team will reply within 24 hours
      End Connection
      Body Material
      Seat Material
      Your Name*
      Your Email*
      Your Phone Number
      Your Company
      Special Requirements