The Aluminum ADR/EN 3.5” (89mm) Pneumatic Interlock Vapor Valve is designed as a positive vapor recovery/transfer valve and is tested and certified to EN13082:2001 with markings per US DOT 49CFR§178.345-5(f).  The sequential interlock design allows the vapor valve to be plumbed in series with the loading or unloading valve which ensures the vapor valve opens prior to air being supplied to the loading or unloading valve.  If an interlock feature is not required, the outlet port can be plugged and the valve will function as a basic non-interlock vapor valve.

The vapor valve features exceptional flow with an inward opening disk and a tapered seat to ensure a tight seal and prevent loss of lading due to surge or roll-over accident.  An aluminum body with stainless trim, FEP Teflon® main seal and fluorosilicone air cylinder seals offers compatibility with a wide variety of products.**  A threaded mounting configuration installs in a 3.844” (98 mm) through hole in the manhole and is secured on the backside with a threaded mounting ring.  The air connections are 1/8” NPT.

The Maximum Operating Pressure is defined as the maximum tank pressure that valve can open against with given air-line pressure.  Maximum Operating Pressure is 15 psi (1.0 bar) with 90 psi (6.2 bar) line pressure supplied and 20 psi (1.4 bar) with 120 psi (8.3 bar) line pressure supplied.*  Valve meets shell strength test of 73 psig (5.0 bar).