英文蝶阀安装说明maintenance instructions

1、Install instruction A. Preparation and attention before install the valve:1. Check the valve with its specification;2. Check the internal and the seat of valve to make sure the harmful liquid inside the valve has been wiped out or cleaned;3. Please install the valve in time when backout the packing.

2、 Dont relax the bearing bolt if not necessary.4. Use standard flange to match the multiple layers metal seat butterfly valve and soft seal butterfly valve. And use the appropriate butterfly valve flange to match the other type of butterfly valve. (See picture 1)5. The person concern install and debu

3、gging must read the manual of butterfly valve, pneumatic actuator, electric actuator, etc. carefully. And must install, operate and debug strictly according with the manual.6. Please fully install the flange or use testing machine before make the pressure test. (See picture 2)7. Please adjust the bu

4、tterfly to close position before install the valve. And cover the internal pipe when welding. (See picture 5)B. Butterfly valve should be installed in horizontal pipelines vertically or horizontally.C. Normally, butterfly valve is use in one direction. Please install the butterfly valve in the mediu

5、m flow direction indicated by the arrowhead on the valve for ensuring smooth flow. (See picture 4)D. When install the flanged type butterfly valve at the end of pipeline, please tie-in the flange to avoid the overload of the valve seat.E. The goods are through strict check and test before leave the

6、factory. But these are still few bolts and nut will loose in the transportation and need readjust. Please adjust the valve according with picture 3. If the disc cannot close very tightly, please turn the bolt 2 in counter-clockwise. And tighten the nut when turn the disc to correct position; If the

7、disc close exorbitance (Or cannot open the disc), please turn the bolt 2 in clockwise, open disc to correct position and then tighten the nut. (See picture 3) Picture 1 D: -Inner bore of flat welding steel flange d:-pipe size Picture 2压板：Pressure plate蝶阀：Butterfly valve垫盘：Pallet装夹台:Holder压力进入管路：Pipe

8、line for pressure entering Picture 3 Picture 4焊接处：welded joint阀门盖板: covering plate of valve Picture 5排出液管：pipe for released liquor 蝶阀安装方向：butterfly valve Install direction 密封关闭压力方向：pressure direction of seal closing压力液室：liquor pressure room蝶板：disc 叶轮：impellerProblem and solutionProbably problemCause

9、SolutionLeakage of sealing face1. Sundries clips in disc or gasket.2. Disc and gasket out of position.3. Fitting flange bolt on output stress unequally or clamp not tight.4. Pressure testing direction not according to requirement of Picture 2.1. Remove sundries, clean inner of valve2. Adjust bolt of

10、 gearwheel or electric actuator, so as to close valve correctly.3. Inspect plane of flange and compressing force which should compress equally.4. Take on pressure according to sealing direction.Leakage of both ends1. Both sides of sealing washer invalid.2. Tubing flange clamp unequally or not clamp tight.3. Upper, lower se