Power station gate valve-Shanghai ShangFa valve manufacturing (group) Co., LTD

Open the process

1, in the closed position, the valve body by the mechanical pressure on the valve, squeezed on the seat.

2, when the hand wheel is rotated counterclockwise, the valve stem is reverse movement, the bottom of the angular plane so that the ball off the valve seat.

3, the stem continues to improve, and the stem of the guide groove in the spiral groove interaction, the ball began to rotate frictionless.

4 until the fully open position, the valve stem to the limit position, the ball rotates to the fully open position.

Close the process

1, When closed, turn the handwheel clockwise, the stem begins to descend and the ball leaves the seat and begins to rotate.

2, continue to rotate the hand wheel, the stem by the guide groove embedded in the spiral groove on the role of the valve stem and the gate at the same time rotating 90 degrees.

3, about to close the gate body has been in contact with the seat without rotating 90 degrees.

4, the last few turns of the hand wheel rotation, the bottom of the valve rod angular plane mechanically wedged to the ball pressure, so that it tightly pressed on the valve seat, to achieve complete sealing.

[Valve Features]

1, the valve cavity with self-tight pressure seal structure, good sealing performance.

2, the valve disc, seat sealing surface made of cobalt-based hardfacing welding, wear-resistant, high temperature, anti-abrasion performance, long service life.

3, the stem by the nitrided corrosion resistance, good corrosion resistance and scratch resistance.

4, high temperature creep design.

5, valve cover stuffing box depth and reasonable, filler plus corrosion inhibitor, sealed and reliable.

6, the valve has a sealed structure to ensure that the valve stem open at run time will not leak.

7, the valve drive mode manual, gear drive, electric, remote control and automation can be achieved.

[Main dimensions]

Nominal diameter	The main dimensions and connection dimensions					Electric device	Weight (kg)
Nominal diameter	d	L	H	L1	L2	Electric device	Weight (kg)
Z960Y-250
100	84	406	1164	437	277	DZW45	234
125	100	483	1402	437	277	DZW60	343
175	158	711	1650	554	309	DZW180	638
225	200	864	1650	554	309	DZW180	654
300	280	1067	2106	764	398	DZW350	1973
Z960Y-320
100	96	533	1236	437	277	DZW60	291
125	118	610	1302	437	277	DZW60	315
150	148	762	1403	526	283	DZW90	672
175	148	762	1650	554	309	DZW180	684
225	222	1041	1650	554	309	DZW180	696
Z960Y-P54100V
175	148	762	1650	554	309	DZW180	683
225	222	1041	1650	554	309	DZW180	704
250	222	1041	1795	554	309	DZW180	1214
300	294	1245	2080	554	309	DZW250	2125
Z960Y-P54170V
125	98	630	1230	437	277	DZW60	312
225	186	1060	1680	554	309	DZW180	1401
300	278	1397	2265	764		DZW500	2834
325	310	1448	2265	690	398	DZW500	2632
350	338	1550	2536	715		DZWC-4

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