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GERMAN STANDARD F4 SOFT SEALED GATE VALVE

GERMAN STANDARD F4 SOFT SEALED GATE VALVE

GERMAN STANDARD F4 SOFT SEALED GATE VALVE
CategoriesGate Valve
BrandKRV
ModelDN40-DN1000
Update Time2021-09-27
Detail Information

The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valves form wedges. The wedge angle varies with the valve parameters, usually 50. When the medium temperature is not high, it is 2 52. Wedge gate valve can be made into a whole, called rigid gate; it can also be made into a gate that can produce slight deformation to improve its workability, make up for the deviation of sealing surface angle in the process of processing. This kind of gate is called elastic gate.

Usually there are trapezoidal threads on the lifting rod. Through the nut at the top of the valve and the guide groove on the valve body, the rotary motion is changed into linear motion, that is to say, the operating torque is changed into the operating thrust. When opening the valve, when the gate lifting height is equal to 1:1 times the valve diameter, the flow passage is completely open, but when running, this position can not be monitored. In practical use, the vertex of the valve stem is used as the sign, that is, the position of the valve stem that is not moving is used as its full open position. In order to consider the locking phenomenon of temperature change, the valve is usually opened to the vertex position and reversed to 1/2-1 turn as the position of the fully open valve. Therefore, the full open position of the valve is determined by the position of the gate (i.e. stroke).

 

Product characteristics:

1. Flat-bottomed seat, no accumulation of dirt, make the seal more reliable.

2. The valve disc is encapsulated with NBR as a whole. The inner parts of the valve are made of corrosion-resistant stainless steel and copper alloy, which can be used for sewage system to adapt to harsh working conditions.

3. Small size, light weight, easy to install and maintain

4. The valve stem is sealed with three O-rings, which greatly reduces the friction resistance of the switch and makes the switch light and water-tight.

暗杆软密封闸阀

 

Major Component Materials

name

Texture of material

valve body

Ductile iron

Valve plate

Ethylene propylene rubber

Nut

brass

Bolt

SS201

Bonnet

Ductile iron

Opposite open loop

brass

Type O circle

Ethylene propylene rubber

Stem

 20Cr13

Top cover

Ductile iron

handwheel

Ductile iron

Dust cover

Ethylene propylene rubber

 

Main Dimensions Table

DN(mm)DD1D2LHN-ødb
1016251016251016F45163F5101625101625
4015015015011011011084841401652401844-194-19 4-19 18 18 18
5016516516512512512599991501782502354-194-19 4-19 19 19 19
651851851851451451451181181701902702654-194-19 8-19 19 19 19
802002002001601601601321321802032802908-198-19 8-19 18-19 18-19 18-19
1002202202351801801901561561902293003208-198-19 8-22 18-19 18-19 18-19
1252502502702102102201841842002543253808-198-19 8-26 18 18 24
1502852853002402402502102102102673504608-238-23 8-26 19 19 24
2003403403602952953102662662302924005208-2312-23 12-26 20 20 24
25040540542535035537031931925033045063012-2312-2812-30 22 22 27
30046046048540041043037037027035650072012-2312-28 16-30 24 22 30
35052052055546047049042942929038155080016-2316-28 16-33 25 25 33
40058058062051552555048048031040660085016-2816-31 16-36 28 28 -
450640640-565585 548548330432650100020-2820-31 - 29 29 -
500715715-620650 609609350457700120020-2820-34 - 31 31 -
600840840-725770 720720390508800135020-3120-28 - 33 33 -
700895910-840840 800800430610-139024-3024-36 - 32 32 -
80010151025-950950 900900470660-152024-3424-40 - 35 35 -
90011151125-10501050 10001000510711-209028-3428-40 - 36 36 -
100012301255-11601170 11121112550811-198028-3728-43 - 40 40 -
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