Ductile Iron Check Valve DN200 High Quality and Reasonable Price

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Technical Date	Material Specification
Nominal Diameter	DN40-DN1000	Valve Body	Cast Iron or Ductile Iron
Nominal Pressure	PN10/PN16	Valve Disc	Cast Iron or Ductile Iron or Stainless Steel
Operation Temperature	-40°C~225°C
Flange Driling Standard	EN 1902-2 PN10/16	Seal Material	EPDM OR NBR
Suface Treatment	Painting	Valve Spring	Stainless Steel

Ductile Iron Check Valve DN200 High Quality and Reasonable Price

Q:What kind of check valve is used in the sewage pump of sewage treatment plant?: 2. installation of pump outlet check valve*Swing check valves are generally mounted on horizontal pipes: for bore DN~80mm check valves, they can also be mounted on vertical or upward sloping pipes.*Straight through lift check valves shall be installed on horizontal pipes; vertical lift check valves must be mounted on vertical pipes and medium upward flow.*As the check valve is easy to damage, therefore, should be installed near the pump outlet valve, in the upper part of the check valve with a cut-off valve (general use of ball valve or gate valve), easy to overhaul.*To facilitate the relief of the check valve before disassembly, the relief valve shall be installed between the check valve and the shut-off valve.

Q:How can the check valve be distinguished from the cut-off valve?: Stop valve has a handwheel, the general check valve by gravity or spring action, there is no operating mechanism, but the large check valve is there.

Q:How do I use the triangle and check valves?: The triangle valve is used for connecting taps and water equipment. Check valves are used to prevent backflow of water.

Q:Do you still need to check valve fittings for solar water heater installation?: Need to be installed to prevent hot water from flowing back.The hot water flow is mainly refers to the low pressure tap water (tap water pressure is insufficient to reach the roof) or tap water pressure is not stable and high and low, at this time, Sheung Shui solar water heater, the water heater on the roof, the natural water level drop, the water heater will flow to the water in the road, if there are many hot water heaters, not only not to cold water, the result will make the hot water flow, water reverse, hot water outflow phenomenon caused by the user in tap water downstairs. To solve the backflow of hot water, a check valve is installedIn the control of the water valve can be installed about.

Q:Butterfly micro stop type check valve HH46XP-10Q, what does the letter mean?: The first H stands for slow closing, the second H represents the check valve, the X represents the sealing surface, and the rubber, the P represents the butterfly plate, and the stainless steel Q represents the ductile iron.

Q:The check valve on the air pipe is installed in front of the fan and is there any difference in the back (direction is correct)?: Yes。Installed in front of the wind blowing, the top open check valveIt is difficult to install the check valve, which is installed on the rear by the force of air suction.

Q:Assembling process of clip type check valve: Among them, the stainless steel clip check valve belongs to this type of valve, which includes swing check valve and lift check valve. The swing check valve has a hinge mechanism and a gate like valve free against the inclined seat surface. In order to ensure that the valve can reach the appropriate position of the seat surface at any time, the disc is designed in the hinge mechanism so that the disc has enough swing space to make the disc real and comprehensive contact with the valve seat. The disc can be made of either metal or leather, rubber, or synthetic coverage, depending on performance requirements.

Q:Is the check valve the same?: The same thing, the different name, the appraisal finishedPrices vary greatly, probably due to specifications, material, performance and other differencesIf you need to know more, you can call me, see the user name is my Unicom number

Q:What does "H" for H42W check valves mean?: through type ---1B. vertical ---2SwingA. single ---4B. multi flap ---5C. double flap ---6ButterflyA. double valve ---7B. single ---8Shuttle ----9H: Valve code, is the check valve code, 4: connection mode is flange connection; 2: valve form is vertical lift; W: sealed form, on behalf of the body of the sealing surface

Q:How to install the check valve?: Mounting position of check valve:Installed in the cut-off valve (solenoid valve, pneumatic valve, etc.), to prevent the back of the valve medium, the formation of back pressure or water hammer, affecting the normal use of the front valve.Check valve installed in the pipe bend elbow or vertical direction of the drop is larger, but also to prevent water hammer impact on the pipeline and damage.

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