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Pressure Relief Valves

281 PRI® Valve, NACE Compliant

This miniature pressure relief valve is only .281” in diameter and 1.11” in length. This high speed, direct acting valve is constructed entirely of corrosion-resistant materials that are compliant with NACE specification MR0175/ISO 15156. Minimum cracking pressures are available from 80 thru 3,600 psid. Available with an integral safety screen for added protection.

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Key Product Facts
  • Weighs only 4.5 grams
  • Relief Flow Lohm Rate: 220 Lohms max
  • Rated for Operating Pressure up to 3,000 psi
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Part Numbers
PRFA2819080L, PRFA2819120L, PRFA2819200L, PRFA2819300L, PRFA2819400L, PRFA2819500L, PRFA2819600L, PRFA2819700L, PRFA2819800L, PRFA2819900L, PRFA2819100D, PRFA2819110D, PRFA2819120D, PRFA2819140D, PRFA2819160D, PRFA2819180D, PRFA2819200D, PRFA2819220D, PRFA2819240D, PRFA2819250D, PRFA2819260D, PRFA2819280D, PRFA2817080L, PRFA2817120L, PRFA2817200L, PRFA2817300L, PRFA2817400L, PRFA2817500L, PRFA2817600L, PRFA2817700L, PRFA2817800L, PRFA2817900L, PRFA2817100D, PRFA2817110D, PRFA2817120D, PRFA2817140D, PRFA2817160D, PRFA2817180D, PRFA2817200D, PRFA2817220D, PRFA2817240D, PRFA2817250D, PRFA2817260D, PRFA2817280D, PRFA2817300D, PRFA2817310D, PRFA2817320D, PRFA2817330D, PRFA2817340D, PRFA2817350D, PRFA2817360D, PRRA2817080L, PRRA2817120L, PRRA2817200L, PRRA2817300L, PRRA2817400L, PRRA2817500L, PRRA2817600L, PRRA2817700L, PRRA2817800L, PRRA2817900L, PRRA2817100D, PRRA2817110D, PRRA2817120D, PRRA2817140D, PRRA2817160D, PRRA2817180D, PRRA2817200D, PRRA2817220D, PRRA2817240D, PRRA2817250D, PRRA2817260D, PRRA2817280D, PRRA2817300D, PRRA2817310D, PRRA2817320D, PRRA2817330D, PRRA2817340D, PRRA2817350D, PRRA2817360D, PRFA2819300D, PRFA2819310D, PRFA2819320D, PRFA2819330D, PRFA2819340D, PRFA2819350D, PRFA2819360D, PRRA2819080L, PRRA2819120L, PRRA2819200L, PRRA2819300L, PRRA2819400L, PRRA2819500L, PRRA2819600L, PRRA2819700L, PRRA2819800L, PRRA2819900L, PRRA2819100D, PRRA2819110D, PRRA2819120D, PRRA2819140D, PRRA2819160D, PRRA2819180D, PRRA2819200D, PRRA2819220D, PRRA2819240D, PRRA2819250D, PRRA2819260D, PRRA2819280D, PRRA2819300D, PRRA2819310D, PRRA2819320D, PRRA2819330D, PRRA2819340D, PRRA2819350D, PRRA2819360D

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The Lee Company has developed the Lohm Laws for defining and measuring resistance to fluid flow. The Lohm is defined such that 1 Lohm will flow 100 GPM of water with a pressure drop of 25 psi at a temperature of 80°F.

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