Payment & Shipping Terms:
|Nominal Diameter:||DN40-DN200||Working Pressure:||300PSI|
|Nominal Pressure:||1.0MPa Or 1.6MPa||Connection:||Flange|
|Material:||Cast Iron, Ductile Iron, Stainless Steel, Carbon Steel||Color:||Blue, Red, Purple Or Customer Requied|
fire fighting gate valve,
fire check valve
Regorge Preventer is one kind strictly defined in the pipeline the water only can unifiow the water power cxxitrol aggregate unit, its function is in any situation prevented in the pipeline the medium flows backwards, achieved avoids flowing backwards the pollution goal.
This vavle is suitable on system such as petroleum, chemical industry, foodstuff, medicine, papemaking, water and electricity, shipping, plumbing, the smelting and sources of energy etc the pipe route. Can regard on gas, liquid, semifluid as well as solid powder pipes and power lines and the container of many kinds of corrosiveness and non-corrosiveness adjusts and dams a river the equipment use. Especially extensively being in high layer of building fire protection system reaches other to show in the pipes and power lines system of valve of vavle switch state.
Main dimensions and weight
|DN(mm)||Valve long||Valve high||Weight(kg)|
Regorge Preventer the principle of work is has flcjwed enters when the water check valve because the mechanical resistance using the medium and has flowed the loss of head but the reduced pressure, causes the inlet pressure to be higher than the draw-off valve cavity the pressure, but on the draw-ofF valve diaphragm pressure is the inlet pressure, on the diaphragm the pressure is bigger than the draw-off valve cavity and the spring resistance, the draw-off valve maintenance closure, the medium normally flows, when the inlet pressure and the draw-off valve cavity pressure difference is smaller than 0.02MPa, the medium is at the critical state which flows backwards, by now on the draw-off valve diaphragm the pressure was smaller than the draw-off valve cavity and the spring pressure, the drawoff valve automatically opens, will ftaw backwards outside the medium eduction tube, simultaneously the massive air admission valve cavity, formed the air room partition, ceased the medium to flow backwards, Is bigger than when 0.02MPa draw-off valve automatic shut-off.
After the valve the pipe network hydraulic pressure elevates when surpasses the valve advance water end hydraulic pressure, if second unidirectional make a round trip;goes to the valve seal to be complete, the water body cannot flow backwards, this time draw-off valve closure not drainage, when the second Jianxi check valve seal malfunctions when has the leakage,frie draw-off valve opens the drain- ing water decompression.
1. Before installment, dean all pipelines.
2. Flows backwards the stopper according to the valve body arrow to the level installment installs the position to be supposed to facilitate the debugging and the service.
3. Regorge preventer beginnings and ends to be supposed to install the service gate valve, before the import installs the filter, moreover shcxild have an end to be loaded with the attachment
4. The draw-off valve should not be smaller than 300mm from the ground, draw- off valve below should remain has the draining water ditch. After
5. After the installment finished, the primary start use, should dose exports the gate valve, slowly opens imports the gate valve, lets the medium slowly fill flows backwards the stopper, turns on each test ball valve to remove the valve air, after treats the valve cavity uniftow. slowly turns on the gate valve, lets the water fill the pipeline.
6. When import medium pressure variation, the draw-off valve appears the few water leakages to be the normal
Installs the position:
1. Turns on the user by the municipal administration pipe network to direct the water pipe between the water meter and on the valve pipeline.
2. On fire pump adapter on lead-in tube or fire outlet pipe.
3. In the water supply system has the chemical to pour into gives on the water pipe.
4. On the heater cold water water inlet pipe, and so on possibly produces on the water supply pipeline which flows badcwards.
Contact Person: Sales Manager