PP Breather Valve

• Media: Water
• Standard: Water Vapour Oil
• Certification: CCC, RoHS, ISO, CE
• Temperature: High Temperature
• Connection: Flange
• Valve Seat: Double-Seat
• Model NO.: PP
• Structure: Piston
• Material: Cast Iron
• Transport Package: Wooden Box
• Specification: DN15-DN800
• Trademark: XC
• Origin: China
• HS Code: 8421219990
• Production Capacity: 9999

Product Description

PP breathing valve is mainly used to hold atmospheric pressure and low pressure storage tanks that do not allow leakage of certain volatile chemical substances (such as hydrochloric acid, nitric acid, hydrofluori-c acid storage tanks), PP breathing valve needs to be installed on the top of the storage tank, as a breathing ventilation device of the storage tank, to ensure that the pressure in the storage tank is in a normal state. To prevent the positive pressure and negative pressure in the tank can not be discharged and the tank is damaged, and the PP breathing valve can also reduce the volatilization loss of the liquid in the tank.

According to the national "petrochemical design fire Code" (GB50160-92) provisions: "A, B class liquid fixed roof tank, should be equipped with flame arrester and breathing valve", and China's breathing valve product type is single, but also can not meet the needs of the petrochemical departments. Especially in the anti-corrosion breathing valve products, in the acid and alkali containers need to have corrosion resistance acid and alkali type breathing valve, Wuxi Pan Pu environmental protection professional engaged in PP plastic processing industry, has a professional PP plate, pipe to the finished product design, processing capacity, in order to solve the problem of storage tank breathing ventilation, Wuxi pan Pu Environmental Protection Co., Ltd. developed WX series PP breathing valve. PP breathing valve has many types, complete specifications, compact structure, light weight, large ventilation, small leakage and other advantages.



Wuxi Pan Pu Environmental Protection Co., Ltd. according to user needs and national specifications design PP material single call valve, single suction valve, double nozzle breathing valve, various structural types can be combined with flame arrester structure, all types of breathing valve are in accordance with the actual inhalation and exhalation pressure test before delivery.

PP breathing valve specifications and models

Model Number	Type	Model number	Type
WX-1	Breather valve	WXF-1	Fire stop breather valve
WX-2	Breather valve with double nozzle	WXF-2	Fire breather valve with double nozzle
WX-3	Breather valve with suction nozzle	WXF-3	Fire breather valve with suction nozzle
WX-4	S with exhalation nozzle breather valve	WXF-4	Fire block breather valve with exhalation nozzle
WX-5	Single call valve	WXF-5	Fire blocking single suction valve
WX-6	Single suction valve	WXF-6	Fire stop single call valve
WX-7	Exhalation valve with nozzle	WXF-7	Fire blocking exhalation valve with nozzle
WX-8	Suction valve with nozzle	WXF-8	Fire suction valve with nozzle

Note:

• PP breather valve model is indicated by WX, WXF is fire resistance breather valve code.
• PP breather valve models are classified by whether the suction and exhalation outlets are connected.

PP Breather valve features

• Suitable for all kinds of petroleum, chemical, pharmaceutical, energy, special liquid or gas and other materials
• Explosion-proof class: BS5501: IIA, IIB, IIC.
• Shell material: PP polypropylene
• Disc and seat material: PP PP
• Seal material: PTFE.
• Flange standard: HG20592-97 PN1.0 If customers need to use GB, SH, HGJ, JB, ANSI, JIS and other standards or change the pressure level, please indicate in the order contract.
• Manufacturing and testing standards: according to (oil tank breathing valve) SY7511-87, (oil tank flame arrester performance and test method) GB5908-86 and other standards for manufacturing and acceptance, or customer specified standards.

PP breathing valve operating pressure

• -295Pa (-30mmH2O)/+355Pa (+36mmH2O )
• -295Pa (-30mmH2O)/+980Pa (+100mmH2O )
• -295Pa (-30mmH2O)/+1750Pa (+180mmH2O )
• -295Pa (-30mmH2O)/+9800Pa (+10000mmH2O )

PP plastic Breather valve installation method

• The PP breather valve is installed at the highest point of the storage tank in order to reduce the evaporation loss of materials and maintain the air pressure balance inside and outside the storage tank. General vertical oil tank, fire resistance breathing valve is installed in the central range of oil tank roof; For the storage tank with a heat insulation layer on the top of the tank, the fire resistance breathing valve can be installed near the ladder platform.
• Wuxi Pan Pu in the PP plastic breathing valve factory, flange sealing surface with plastic protective cover, so as not to cause damage to the flange sealing surface during transportation, when the goods to the site installation, be sure to remove the flange protective cover, and then vertically installed on the top of the storage tank. PP breathing valve can not be placed horizontally and inverted, if the top of the storage tank needs to install two PP breathing valves, PP breathing valve and the center of the tank top should be symmetrically installed.
• PP breathing valve with nozzle installed on the storage tank is generally used for 1-3 months, it is necessary to regularly check the breathing valve positive and negative pressure valve disc work is flexible, PP breathing valve in normal work, will emit "hiss - hiss" pressure relief exhaust sound, otherwise, need to open the valve cover on the top of the breathing valve, check whether the breathing valve disc appears "chuck" phenomenon. Whether there is dirt on the guide rod, if there is timely clean up the dirt, to ensure that the guide rod runs freely. Whether the sealing surface of the valve seat is worn, if it is worn, it should be replaced immediately to ensure the normal and safe operation of the breathing valve.
• The positive and negative pressure valve disc of PP plastic breathing valve is constantly changing and moving up and down according to the rise and fall of the pressure in the tank. When the fire stop breathing valve is used for three years, it is generally necessary to replace the valve disc, guide rod and sealing surface of the valve seat inside the fire stop breathing valve to ensure the normal operation of the fire stop breathing valve and maintain the safe operation of the storage tank.