Suction Pump Shear Valves

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Suction Pump Shear Valves

Post by crcind » Mon Nov 06, 2017 7:40 am

What is the difference between the EBW 664 valve and the OPW 70S valve? Can either one be installed under a suction pump to meet NFPA regs.?

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Re: Suction Pump Shear Valves

Post by tankgenie » Thu Nov 09, 2017 10:33 am

This would be my understanding - the EBW 664 and old Tok 52 valves are shear valves for suction pumps that include a pressure regulating section that is required when suction pumps are used with ASTs. The 70S is a shear valve designed for a suction application, but does not have a pressure regulating section.
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Re: Suction Pump Shear Valves

Post by CherokeeUST » Mon Nov 13, 2017 8:09 am

First, Tankgenie knows much more about suction systems and AST's than I do.

I don't think any of our suction systems have shear valves.

Per 2018 version of NFPA 30A 6.3.10-- ... l?code=30A

Shear valves are only required IF a booster pump is utilized or the tanks create a gravity head. A vacuum-actuated shutoff valve with a shear section or the shear valve has to be listed and labelled in accordance with UL 842, Standard for Valves for Flammable Fluids.

UL 842-

I think you could use EBW 664 or Tokheim 52 since they are pressure relief valves. ... Highlights ... &warning=0

Or the EBW 662 or OPW 10SHMTP-5811 are UL 842 listed shear valves- ... Highlights ... off-valves
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Re: Suction Pump Shear Valves

Post by colin123 » Fri Sep 20, 2019 2:14 am

RIS-UPV under pump valves were designed to update tank top take a look at valves, and so save you leakage from defective suction strains and pipe-paintings joints. In the case of a leak within the suction strains the pump will lose top indicating a trouble. The elective stainless steel mesh strainers will guard the take a look at valve and additionally the dispenser internals.

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Re: Suction Pump Shear Valves

Post by aoreilly » Fri May 29, 2020 10:43 am

Does anyone have experience testing a product line with an EBW 664 valve installed at the dispenser? Are the procedures the same as when testing a line with a Tokheim 52 valve installed?
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