OPW 199ASV Anti-Siphon Valve

The OPW 199ASV Anti-Siphon Valve is designed to help prevent siphoning of an aboveground storage tank should a leak or break occur in the fuel supply line. The 199ASV installs on the top of an aboveground storage tank with a suction rod on the inlet and the fuel supply line (to a remote pump) on the outlet of the valve. A poppet in the valve remains normally closed, isolating the tank from siphoning. When the remote pump is activated, it overcomes a factory-adjusted spring set to a predetermined hydrostatic head pressure and allows flow of fuel out of the AST. An internal pressure relief valve helps absorb thermal expansion in the fuel supply line. The 199ASV is available in female NPT threads with four different factory-adjusted hydrostatic head pressure settings.

Features & BenefitsOrdering SpecificationDownloads

Features & Benefits

  • Factory-Adjusted Hydrostatic Head Pressure Settings – Allow for quick, safe and easy installation on aboveground tanks.
  • Internal Pressure Relief Valve – Helps protect piping & fittings from damage due to thermal expansion. Set to operate between 20 to 40 PSI (1.3 to 2.7 bar).
  • Aluminum Bodies – Compatible with gasoline, diesel, kerosene, ethanol, methanol, fuel oil, and jet fuels.
  • Temperature Rating – -20°F – 120°F (29°C – 49°C)

Materials

  • Body: clear anodized aluminum
  • Bonnet: powder-coated aluminum
  • Cap: powder-coated aluminum
  • Spring: stainless steel
  • Poppet: hard-coated aluminum
  • Screw: hard-coated aluminum
  • Poppet Seal: Nitrile

Listings and Certifications

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Ordering Specifications

Product #in.mmlbs.kgsHydrostatic Head Pressure*
(Dimension A)
199ASV-10753/4191.6.7250′-5′
199ASV-20753/4191.6.7255′-10′
199ASV-30753/4191.6.72510′-15′
199ASV-11001251.6.7250′-5′
199ASV-21001251.6.7255′-10′
199ASV-31001251.6.72510′-15′
199ASV-11501-1/2382.0.9070′-5′
199ASV-21501-1/2382.0.9075′-10′
199ASV-31501-1/2382.0.90710′-15′
199ASV-12002512.0.9070′-5′
199ASV-22002512.0.9075′-10′
199ASV-32002512.0.90710′-15′

*Note: Head Pressure calculated for gasoline.

Dimensions

 

 

  • 8-3/32″ model for 11/2″ and 2″ (20.55cm model for 3.81cm and 5.08cm)
  • 6-1/2″ model for 3/4″ and 1″ (16.51cm model for 1.90cm and 2.54cm)

Valve Rating (ft of gasoline S.G. = 0.7)Approximate Cracking Pressure
PSIft H2Oin. H2Oin. Hgft Gasft Diesel
0-51.884.3351.963.856.25.35
5-103.688.48101.767.5312.1210.47
10-155.612.92155.0411.4718.5115.95
15-207.417.07204.8415.1624.421.07

Note: Some suction pumps may not have enough horsepower to open valve properly.