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. (Recomended 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 - Vacuum Breaker only, 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.

• Vacuum pressure to open 0.5 psi differential
  

760 - Combination Pressure Relief & Vacuum Breaker. Provides both pressure relief and vacuum breaking with in a single housing. "Acts as a 2-way breather." Similar in design to the #760 DOT, but releases at lower pressure and has less stringent leak requirements.

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

760 DOT - Combination Pressure Relief & Vacuum Breaker. Currently used for DOT certified IBC's.

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

Additional Features:

A seal is formed at the internal tank surface, minimizing the contact of product vapor with the spring surfaces.
Pre-set factory pressure and suction relief levels. Once set, the unit is permanently joined by ultrasonic welding, preventing alteration of the specified pressure venting levels.
Machined sealing surfaces.
Dome-shaped cover to prevent ice and snow build-up from interfering with valve function.
Valve material contains a full complement of Environmental Stress Additives (ESA) including Ultraviolet (UV) to prevent weathering.