Pressure and vacuum relief breather valve is designed to protect low pressure storage tanks from excessive Pressure (or vacuum) created by thermal expansion (and contraction) and product movement into(out of) the tank and at the same time minizing costly product evaporation/loss.
Excesses in pressure or vacuum may also cause permanent deformation to the tank or unbalance a vapor recovery system.
The pressure and vacuum relief breather valve is installed on the storage tank roof. The valve may be mounted in onjunction with a KSFH or KSFI flame arrester to provide maximum protection against excessive pressure and vacuum while minizing accidental ignition of flammable product vapor from external sources.
The model KSBBFI and KSBSFI pressure vacuum valves with flame arrester are an advanced design for vent to atmosphere applications.
Designed manufactured and tested according to the API 2000,NFPA 30,ISO 28300 code and BS7244,EN ISO 16852 these valves utilize the latest echnologies to provide protection against positive or vacuum over pressure and prevent air intake, evaporative losses of product and help to contain odorous and potentially explosive vapours.
Model KSBBFI /BSFI, which is used for the protector of fluid storage tank, is composed of one body with the functions of pressure relief, vacuum relief, and to block the external repellent fire.
This is consist of the flame arrester which blocks the external repellent fire, the function of discharge the overpressure developed during intake air to the storage tank, and the function of intake the air under the constant pressure during unloading. And this is the safe valve to prevent the many kinds of storage tank from the deflation (vacuum), inflation ( pressure ) and fire.
The standard flame cell (Screen or Element) is suitable for NEC group D or IEC IIA gases, Cells for other gas groups are available as additional extras.
The KSBBFI is a weight pallet model designed to handle pressure and vacuum with a minimum pressure of +/-25mmW.C and a maximum setting of +/- 700mmW.C
The KSBSFI is a spring loaded model designed to handle pressure and vacuum with a minimum pressure of +/-700mmW.C and a maximum setting of +/- 7,000mmW.C.
Body materials are available in Aluminium, Carbon Steel, 304SS and 316SS with various trims to suit individual requirements.
Sizes range from 50mm through to 300mm with ANSI 150lb FF flanges as standard. (Different connections available on request).
The valves have additional FM factory mutual approval for 4" 6" 8" sizes & Atex cert(2"~12").
PRESSUR VACUUM RELIFE VALVE WITH FLAME ARRESTER (WEIGHT TYPE)
|PRESSUR VACUUM RELIFE VALVE WITH FLAME ARRESTER (WEIGHT TYPE)
||2” through 12”
||AL / C.S / S.S
||25 ~ 700mmW.C
||-25 ~ -700mmW.C