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Relief Vents

  • 1 PSI Reliever with EPDM O’Ring

    The ChemPlas Light Pressure “RELIEVER” is extremely sensitive to pressure build up. In a catastrophic fall or tip over, the “RELIEVER” is completely fail safe.
    Injection molded from virgin Polypropylene, the “RELIEVER” has superior chemical resistant properties.

    The Light Pressure/Vacuum “RELIEVER” is set to operate at pressures between .5 and 1 PSIG. Vacuum releases at .5 PSI (for gravity flow only). As with all ChemPlas “RELIEVERS”, it has a 2” straight NPT. Lock nuts are available upon request.
    We offer a variety of O’rings and springs to suit each individual application. Our standard O’ring is Viton (brown) for maximum chemical resistance. EPDM, BUNA and EPDM/FDA food grade are available upon request. Our standard spring is wound from 316 Stainless Steel. We also offer Teflon coated 316 Stainless as well as Hastelloy C which is one of the most universally corrosion-resistant alloy available.

    Assembly and test are done in a clean atmosphere. Testing of both models is performed on a calibrated and certified pressure gauges with each unit in place simulating “in service” conditions.


  • 10 PSI Reliever with EDPM O’Ring

    The ChemPlas DASH-1 “RELIEVER” will at once sense a tank pressure buildup or internal vacuum and “relieve” it. In a catastrophic fall or tip over, the DASH-1 “RELIEVER” is completely fail safe. The unit has an indefinite working life and will be replaced if found defective within two (2) years.
    Injection molded from virgin ultra-violet stabilized Polypropylene, the “RELIEVER” has superior chemical resistant properties.
    The Pressure/Vacuum “RELIEVER” is available in two (2) versions. Model #-050 is set to operate at pressures between 3.5 and 5.5 PSIG. Model #-100 is set to operate between 10 and 12.5 PSIG. Vacuum releases at .5 PSI on both models (for gravity flow only). Both models thread into 2” Straight NPT. Lock nuts are available upon request.

    We offer a variety of O’rings and springs to suit each individual application. Our standard O’ring is Viton (brown) for maximum chemical resistance. EPDM, BUNA and EPDM/FDA food grade are available upon request. Our standard spring is wound from 316 Stainless Steel. We also offer Teflon coated 316 Stainless as well as Hastelloy C which is one of the most universally corrosion-resistant alloy available.


  • 5 PSI Hastelloy Springs Reliever with Viton Gasket

    The ChemPlas DASH-1 “RELIEVER” will at once sense a tank pressure buildup or internal vacuum and “relieve” it. In a catastrophic fall or tip over, the DASH-1 “RELIEVER” is completely fail safe. The unit has an indefinite working life and will be replaced if found defective within two (2) years.
    Injection molded from virgin ultra-violet stabilized Polypropylene, the “RELIEVER” has superior chemical resistant properties.
    The Pressure/Vacuum “RELIEVER” is available in two (2) versions. Model #-050 is set to operate at pressures between 3.5 and 5.5 PSIG. Model #-100 is set to operate between 10 and 12.5 PSIG. Vacuum releases at .5 PSI on both models (for gravity flow only). Both models thread into 2” Straight NPT. Lock nuts are available upon request.

    We offer a variety of O’rings and springs to suit each individual application. Our standard O’ring is Viton (brown) for maximum chemical resistance. EPDM, BUNA and EPDM/FDA food grade are available upon request. Our standard spring is wound from 316 Stainless Steel. We also offer Teflon coated 316 Stainless as well as Hastelloy C which is one of the most universally corrosion-resistant alloy available.

     


  • 5 PSI Reliever with Viton O’ring

    The ChemPlas DASH-1 “RELIEVER” will at once sense a tank pressure buildup or internal vacuum and “relieve” it. In a catastrophic fall or tip over, the DASH-1 “RELIEVER” is completely fail safe. The unit has an indefinite working life and will be replaced if found defective within two (2) years.
    Injection molded from virgin ultra-violet stabilized Polypropylene, the “RELIEVER” has superior chemical resistant properties.
    The Pressure/Vacuum “RELIEVER” is available in two (2) versions. Model #-050 is set to operate at pressures between 3.5 and 5.5 PSIG. Model #-100 is set to operate between 10 and 12.5 PSIG. Vacuum releases at .5 PSI on both models (for gravity flow only). Both models thread into 2” Straight NPT. Lock nuts are available upon request.

    We offer a variety of O’rings and springs to suit each individual application. Our standard O’ring is Viton (brown) for maximum chemical resistance. EPDM, BUNA and EPDM/FDA food grade are available upon request. Our standard spring is wound from 316 Stainless Steel. We also offer Teflon coated 316 Stainless as well as Hastelloy C which is one of the most universally corrosion-resistant alloy available.


  • 5 PSI Reliever, EPDM O’ring.

    The ChemPlas DASH-1 “RELIEVER” will at once sense a tank pressure buildup or internal vacuum and “relieve” it. In a catastrophic fall or tip over, the DASH-1 “RELIEVER” is completely fail safe. The unit has an indefinite working life and will be replaced if found defective within two (2) years.
    Injection molded from virgin ultra-violet stabilized Polypropylene, the “RELIEVER” has superior chemical resistant properties.
    The Pressure/Vacuum “RELIEVER” is available in two (2) versions. Model #-050 is set to operate at pressures between 3.5 and 5.5 PSIG. Model #-100 is set to operate between 10 and 12.5 PSIG. Vacuum releases at .5 PSI on both models (for gravity flow only). Both models thread into 2” Straight NPT. Lock nuts are available upon request.

    We offer a variety of O’rings and springs to suit each individual application. Our standard O’ring is Viton (brown) for maximum chemical resistance. EPDM, BUNA and EPDM/FDA food grade are available upon request. Our standard spring is wound from 316 Stainless Steel. We also offer Teflon coated 316 Stainless as well as Hastelloy C which is one of the most universally corrosion-resistant alloy available.


  • Double Vaccuum reliever with EPDM O’Ring

    The Double Vacuum “RELIEVER” is made to answer the need of IBC users and others who require a breaker for gravity drain or pump out up to 50 GPM without the necessity of removing the fill cover.
    It has a very low profile, is fail safe in a tip over and guaranteed for two years from date of installation. The vacuum releases at .5 PSI.

    Injection molded from virgin Polypropylene, the “RELIEVER” has superior chemical resistant properties.
    Both models thread into 2” straight NPT. Lock nuts are available upon request.

    We offer a variety of O’rings and springs to suit each individual application. Our standard O’ring is Viton (brown) for maximum chemical resistance. EPDM, BUNA and EPDM/FDA food grade are available upon request. Our standard spring is wound from 316 Stainless Steel. We also offer Teflon coated 316 Stainless as well as Hastelloy C which is one of the most universally corrosion-resistant alloy available.


  • Double Vaccuum Reliever with Viton O’Ring

    The Double Vacuum “RELIEVER” is made to answer the need of IBC users and others who require a breaker for gravity drain or pump out up to 50 GPM without the necessity of removing the fill cover.It has a very low profile, is fail safe in a tip over and guaranteed for two years from date of installation. The vacuum releases at .5 PSI.

    Injection molded from virgin Polypropylene, the “RELIEVER” has superior chemical resistant properties.
    Both models thread into 2” straight NPT. Lock nuts are available upon request.We offer a variety of O’rings and springs to suit each individual application. Our standard O’ring is Viton (brown) for maximum chemical resistance. EPDM, BUNA and EPDM/FDA food grade are available upon request. Our standard spring is wound from 316 Stainless Steel. We also offer Teflon coated 316 Stainless as well as Hastelloy C which is one of the most universally corrosion-resistant alloy available.


  • G2 Breather Plug

    G2 Plug with Breather & Pressure-Compensationvent

    *extra red cap seal is available


  • Relief Valve 5 PSI

    Relief vents are designed to protect storage tanks from over pressure and allow product discharge without manually opening a cover. Patented designs incorporate a unique seal that allows the tank to maintain a positive pressure below the set pressure thereby protecting the tank contents from contamination. The vacuum relief feature is designed to increase discharge rate and prevent tanks from deforming under negative tank pressures. These units were originally designed to provide accurate pressure in portable chemical storage tanks, but can be used in a wide variety of applications.

    The low profile design prevents impact damage in the field.


  • ST481645