Vacuum Breakers & Pressure Relief Valves

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Product Information

Vacuum Breakers & Pressure Relief Valves: 

These vacuum breaker and pressure relief valves are made according to US Department of Transport norms and are intended as safety devices for the Intermediate Bulk Container industry.

General Description of Valves:

This unique family of valves is intended to be used as safety devices in Intermediate Bulk Containers. The valve body features 2 inch external threads and is designed to be torqued into a spin weld fitting or a tank lid for a leak-tight installation. (Recommended spin weld fitting, Part Number 58HD)

Technical Specifications

Materials of Construction: 

Valve Bodies & Plungers - High Density Polyethylene (HDPE).
O-rings - Nitrile [Buna] or Fluorocarbon [Viton]
Other O-ring materials can be used given sufficient lead time.
Springs - Zinc-plated Spring Steel and Stainless Steel.
Hastelloy C can be used given sufficient lead time.

Functional Operation

 

 

752 Series - Vacuum Breaker

Allows outside air to enter tank. Applications include chemical spraying or rapid pump out of tank. Protects tank from buckling. Tractor Test Certified. Venting with no spillage. Also refered to as a vent valve or breather.

  • Vacuum pressure to open 0.5 psi differential.

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Part Description Part Number
Vacuum Breaker, Buna Seals, 316 Ss Spring 752-B
Vacuum Breaker, Epdm Seals, 316 Ss Spring 752-EP
Vacuum Breaker, Viton Seals, 316 Ss Spring 752-V
Vacuum Breaker, Viton Seals, Hastelloy Spring 752-VH
 

 

760 Series - Combination Pressure Relief & Vacuum Breakers

Provides both pressure relief and vacuum breaking within a single housing. Acts as a 2-way breather. Similar in design to the 760 DOT Series, but releases at lower pressure and has less stringent leak requirements. Also refered to as a vent valve or breather.

  • Vacuum pressure to open 0.5 psi differential.
  • Pressure relief 1.5 psi.

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Part Description Part Number
Combination Vent, General Purpose 760
Combination Vent, General Purpose, Viton Seals 760-V
Combination Vent, Adblue , Epdm Seals 760 AB
 

 

 

760 DOT Series - Combination Pressure Relief & Vacuum Breakers

Currently used for DOT certified IBC's and UN approved containers for over the road transport of hazardous chemicals. Also refered to as a vent valve or breather.

  • Vacuum pressure to open 0.5 psi differentialial.
  • No detectable leak 3.0 psi
  • Pressure relief 4.0 psi

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Part Description Part Number
Combination Vent, Buna Seals, 316 Ss Spring 760 DOT-B
Combination Vent, Epdm Seals, 316 Ss Spring 760 DOT-EP
Combination Vent, Viton Seals, 316 Ss Spring 760 DOT-V
Combination Vent, Epdm Seals, Hastelloy Spring 760 DOT-EPH
Combination Vent, Viton Seals, Hastelloy Spring 760 DOT-VH
 
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