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Ss304 Pressure Regulating Valve Valved Seal Safety Valve

SS304/316L Sanitary Vacuum & Pressure Relief Valve (Dual-Action Breather Valve)

Safeguard your thin-walled stainless steel tanks against both overpressure explosions and vacuum implosions with the Aomite Sanitary Vacuum & Pressure Relief Valve (VPRV).

Also widely known as a Breather Valve, this highly engineered, purely mechanical device provides critical dual-action protection for fermentation and storage vessels. When the internal tank pressure exceeds the safety setpoint (standard preset at 1 Bar / 14.5 PSI), the valve automatically lifts to exhaust the excess gas. Conversely, if a dangerous vacuum is created during rapid tank draining or cold CIP rinsing (dropping to -0.9 Bar), the valve instantly opens to pull in ambient air, neutralizing the vacuum and preventing the tank from collapsing. Precision-machined from SS304/SS316L with EPDM or FPM seals, it offers ultimate reliability with no pneumatic or electrical power required.

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Color:	SLIVER
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Model:
16
Brand:
AOMITE

Product Description

Technical Specifications

Parameter	Specification
Product Name	Vacuum and Pressure Relief Valve (VPRV) / Breather Valve
Operation Principle	Dual-Action Mechanical Spring/Weight (No pneumatic power required)
Valve Body Material	SS304 or SS316L Stainless Steel
Seal Material Options	EPDM (Standard) or FPM (Viton)
Positive Pressure (Exhaust)	Standard 1.0 Bar (Adjustable options: 0.5 to 2.0 Bar)
Negative Pressure (Vacuum Break)	Standard -0.9 Bar (Adjustable options: 0.01 to 0.1 Bar vacuum)
Max. Working Temperature	120°C (248°F)
Available Port Sizes	1-1/2" to 2" (DN40 to DN50)
Connection Options	Tri-Clamp, Welded, or Threaded ends

How does a Breather Valve (VPRV) handle both pressure and vacuum?

1. Over-Pressure Exhaust
The valve contains a weighted or spring-loaded main disc. When CO2 buildup or fluid filling causes the tank's internal pressure to rise above the positive setpoint (e.g., 1 Bar), the pressure pushes this main disc upward, opening the side ports to vent the gas safely.
2. Vacuum Break (Implosion Prevention)
Inside the main disc is a smaller, reverse-oriented vacuum valve. If the tank drains too quickly, a vacuum is formed. When the pressure drops to the negative setpoint (e.g., -0.9 Bar), the higher external atmospheric pressure pushes the vacuum valve open, sucking air into the tank to instantly stabilize the pressure and prevent the tank walls from crushing inward.

Does this sanitary VPRV require a pneumatic air supply to operate?

Purely Mechanical: No. This is a 100% mechanical safety device. It relies entirely on internal springs and calibrated weights working against the actual fluid/gas pressure inside your tank.
Fail-Safe Design: Because it does not require an external pneumatic air line or electricity, it functions as an absolute fail-safe. Even in a total plant power outage, the valve will still protect your tank from exploding or imploding.