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The Shand & Jurs 94510 Magnavent is a pressure operated emergency vent designed specifically to meet the NFPA ruling on venting requirements for small storage tanks. 

An economically designed and priced unit, the principle of operation is based on a unique magnetic latch.

The pressure setting is accomplished by a permanent magnet attached to the base acting on a magnet plate on the hinged pallet assembly. 

As the pressure increases, the force required to overcome the magnetic attraction between the base and pallet assembly increases until the set pressure is reached. 

The setting is determined by the size and strength of the magnet. Because the force required to overcome the magnet is much greater than the force (or pressure) required to support the pallet assembly, the vent instantaneously goes to full open at the release pressure – there is no “simmering” or leakage as the tank pressure approaches set pressure.

Another innovation incorporated in the Magnavent is the Expanda-Seal technology. 

The tank pressure forces the seal away from the pallet assembly and at the same time forces it against the seat surface of the base with the result that the higher the tank pressure, the tighter the seal becomes. 

Tests have shown that there is less than 0.5 cubic foot per hour leakage at high pressure right up to the release pressure. 

The Teflon Expanding Seal is an added benefit to those users who are concerned about conserving product. 

The performance of the expanda-seal technology makes the 94510 an economical alternative to expensive pilot operated valves or rupture disks where blowdown is not a major concern.
Features
  • Available in 4″, 6″, 8″ & 10″ sizes
  • Inexpensive weights for standard settings
  • Lightweight; saves shipping and installation costs
  • Provides a tight seal up to set pressure using Expanda-Seal technology.
  • Magnetic latch assures instantaneous opening at release pressure
  • Meets requirements of most small or large tanks
  • Settings of 0.5 to 2.75 psig available

Specifications

Brand

Valve Size

  • 4”, 6”, 8” & 10”

Temperature Range

  • -40OF to +140OF *Standard

Standard Settings

  • 0.5 psig thru 2.75 psig

Base & Arm

  • Cast Aluminum, Steel or Stainless Steel

Pallet

  • Aluminum or Stainless Steel

Pallet Seal

  • FEP (Fluorinated Ethylene Propylene), FKM (Fluoroelastomer) NBR (Nitrile-Butadiene), PFA (Fluoroplastic Film)

Magnet

  • Rare-earth (Permanent Magnet)

Magnet Plate

  • Electroless Nickel Plated Steel

Clamp Ring

  • Aluminum, Stainless Steel

Bearings

  • Nylon

Documentation

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