Various Valves

Flat gate Valve


Product Name: Slangging woarpoof gate Valve

                                                            41H-10 10C

 Product Model No.NPZ941H-16 16C

                                                         641H-25

 Specifications (size)DN50-500

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

                                 

Type

Norminal pressure PN

Mpa

Strength test

Pressure

PS

Mpa

Airproof test

Pressure

Pm

Mpa

Work temperature

°C

Max operation pressure

Applicable medium

73

PZ973X-10

673 10C

573

1.0

1.5

1.1

≤100°C

P10

1.0

Ash-water,

residue water mixture;

residue to water ratio≤1:10;

Maximum particle size≤50mm

 

73

PZ973X-10

673 16C

1.6

2.4

1.6

≤100°C

P10

1.6

 

II.     Material of major parts:

Parts name

Material

1.0,1.6

10C,16C\

Vlave

Gray iron

Cast steel WCB

Valve bonnet

Gray iron

Cast steel WCB

Valve seat, flashboard plane

Resistant Rubber and stainless steel

Valve stem

Stainless steel

nuts

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.

Failure

Failure cause

 Solutions  

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.