Tank Valves
pressure/vacuum thIeF HATCH
The Prism DIFFERENCE
COUNTER-FORCE PALLET
0.4 oz/sq. in. setting is less than 0.14 SCFH for ALL VENTS/ALL SIZES at 90% of set point.
The inflating effect of the diaphragm increases as the pressure in the vent rises. This means that when the vent is closer to its set point, the seal is at its greatest performance.
Accumulated knowledge and experience by engineers in the venting industry has been applied to create the standards governed by API 2000 that all manufacturers and end-users must adhere to. Being a major contributor to the progression of the modern tank vent, Prism sits as a member of the API 2000 Task Force to assist in the forward growth and fair play in the industry with focus directed towards safety and stringent testing procedures.
Available Models
SAFE EMISSIONS
Standard (Spring Assist)
- Pressure weight settings from 4 – 16 oz/sq. in.
- Vacuum weight settings from 0.4 – 4 oz/sq. in.
A Comfortable Lead!
Prism breather valves offer a 20% operational buffer beyond all other vents or valves.
We stand by quality and reliability in our products. That is why our vents are individually hand calibrated at our factory. Each vent will receive a certification sheet showing the exact set point of the pressure valve, as well as the leak rate for the valve.
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HOW TO ORDER
•Available in: Carbon(SA516-70N), Stainless Steel(304L/310L) Aluminum, Hastelloy(C276)
Example: The above order number indicates a Pressure/Vacuum Thief Hatch. Inlet is 8”, Carbon Steel body, Teflon diaphragm, Spring loaded, and Factory Epoxy Base Internal Coating.
Supporting Documentation
TECHNICAL DATA
Gas flow, size, and fitment info.
