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3.5″ SENTINEL™ Aluminum Crude Oil Vapor Valve – Threaded Mount
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The SENTINEL™ aluminum 3.5” (89mm) pneumatically actuated interlock crude oil vapor valve is designed as a positive vapor recovery valve for use on DOT cargo tanks that opens against internal tank pressures of up to 50 psi with air line pressure of 110 psig. It is tested and certified to EN13082:2001 with markings per US DOT 49CFR§178.345-5(f). The sequential interlock design allows vapor valve to be plumbed in series with loading or unloading valve.  Air supply to “IN” port of vapor valve will only exit to “OUT” port after vapor valve has positively opened.  If the interlock feature is not required, outlet port can be plugged and valve will function as a basic non-interlock vapor valve.

The valve features a patent pending TwinForce™ dual cylinder design that allows it to begin to open immediately and has a Maximum Operating Pressure of 45 psig of internal tank pressure with 100 psig of air-line pressure, and 50 psig of internal tank pressure with 110 psig of air-line pressure.   Maximum Operating Pressure is the recommended maximum tank pressure at which the valve should be used.

The vapor valve has 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 FEP Teflon® main seal, fluorosilicone air cylinder seals, and stainless trim offers compatibility with a wide variety of products.**

Threaded mounting configuration installs in a 3.84” (98 mm) hole as provided by standard 16” offset manhole and is secured with a threaded mounting ring and set screws.  Air connections are 1/8” NPT.  An e-coated/anodized version is also available for better corrosion resistance and longer service life.

The vapor valve meets shell strength test of 73 psig (5.0 bar) and has an MAWP of 50 psig.