Brief introduction of Pressure Vacuum Relief Valve

Summarize

Pressure vacuum valve is a kind of air breather which install on the petrochemical fixed storage tank,in order to avoid tank over the pressure of over vacuum making the storage tank destruct, prevent the outside flame enter,reduce the tank fluid volatile.

   According the country (petrochemical design fire proof specification)Gb50160 stipulate:” A,B kind fluid fixed arch-roof tank,should set arrester and breathing valve”,in order to meet the requirement,we develop and exploit all-weather(fire-proof) breathing valve whole series.Withing scientific and smart mould、completely specification type、compact construction、light weight、huge breath capacity、small leakage etc features.The product construction have breathing type、single exhaust type、single suction type、reducing type、jacket type (detail information please reference SX series breathing valve),Every kind series can mount arrester,also can mount suction、exhaust connection nozzle,also can manufacture and different material according to different medium such as petroleum、chemical、food industry,totally satisfy every kinds storage system process requirements.

Main technology parameter

Operating pressure:

A、-295Pa(-30mmH2O)+355Pa(+36mmH2O）

B、-295Pa(-30mmH2O)+980Pa(+100mmH2O)

C、-295Pa(-30mmH2O)+1750Pa(+180mmH2O)

D、Customer specified

Working medium

Gasoline、kerosene、diesel oil、aromatic naphtha、air etc,or other petrochemical material, flame retardant gradation choose＂HGJ21-89＂,choose class ‖A or class ‖B decide by customer

The standard

Design Standard: API 2000

Flange: ASME B16.5