Product Name: Slangging woarpoof gate Valve
Product Model No.：NPZ941H-16 16C
I. Application and performance specification
1. Application: As switch device, the valves are applicable for the pipelines which transporting ash-water mixture and residue water in the condition of 1.0 Mpa norminal pressure and working temperture ≤100°C.
2. Performance specification
Norminal pressure PN
Max operation pressure
residue water mixture;
residue to water ratio≤1:10;
Maximum particle size≤50mm
II. Material of major parts:
Cast steel WCB
Cast steel WCB
Valve seat, flashboard plane
Resistant Rubber and stainless steel
Casting aluminum bronze
III. working principle and structure
1. To close down the valve, please rotate the handwheel of the valve clockwise, and the vlave gate will descend and cut off the pipelines. To open it, please rotate the handwheel anticlockwise and the valve gate will rise and switch on the pipeline.
2. the flange connectiong size of the vlave is according to the rules of GB9112 and GB9113.1~GB9113.26.
IV. Maintenance, installation and use.
1. pluge up both the ends of the valve pathway. Keep them in the drying and ventilating room. Check the valve regularly to prevent rusting.
2. Clean the interior of the valve before installation, and clear away the dirt attached in the valve during transporting.
3. Make sure the symbol and nameplate on the vlaves satisfy the application requirements.
4. the valves should be installed at the level position of the vertical pipelines or vertial positions of level pipelines for convenient maintenace and operation.
5. It’s only applicable for full-open or full-close, but not for throttle. Protect the sealing surfaces from scouring to extend life..
6. open or close the valves by handwheel or electric operation but not by the leverage or other tools.
7. keep the transmission parts clean, and add the lubricant regularly.
8. Adjust the electric actuator of motorized valve: to close the valve by torque control of actuator; to open it by travel control. the torque and travel of the device have been adjust, please don’t adjust them at random.
9. check the coupling bolts whether loosen or not, which connecting the electric actuator of motorized valve to vlave.
The valve stem can not rotate flexibly
1. the filling is pressed too tightly or the cover inclined.
2. damages or dirt exist between the nult and screw.
1.adust the nut of filling cover;
2.dismantle and repaire the screw or clear away dirt, and lubricate it.
Leakage happended at the filling place
1.the cover is not pressed tight.2filling is not enough.
3. the filling is excessively used or failure
1. press the nuts on the cover evenly;2.add adequate filling.3.replace the filling.
Leakage happended the joint posistion among the valve, bonnet and valve seat.
1.the nuts haven’t been screwed down or screwed unevenly. 2. damages or dirt exist on the seal surface. 3. the gasket is damaged.
1.screw down the nut evenly. 2.repaire or clear the seal surface. 3.change a new gasket.
Leakage happended on the seal surface between valve and seat
1. dirt exist on the seal surface 2.the seal surface is damaged
1.clean the surface
2.change a new valve seat.