Stainless Steel Gate Valve

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Product details

Stainless steel gate valve is a gate valve made of stainless steel material (201.304.3016.3al.2205, etc.). Its external structure is no different from that of ordinary gate valves, with a slight difference in color. The natural color of stainless steel gate valves is bright, while ordinary gate valves are black and shiny. Therefore, it is easy to distinguish between stainless steel gate valves and ordinary gate valves from the appearance. Generally, the casting of gate valves will have corresponding material markings, so it is not difficult to distinguish.

Working principle of stainless steel gate valve:

The gate plate of a stainless steel gate valve moves in a straight line with the valve stem, which is called a rising stem gate valve (also known as a rising stem gate valve). Usually, there is a trapezoidal thread on the lifting rod, which converts rotary motion into linear motion through the nut at the top of the valve and the guide groove on the valve body, that is, turning operating torque into operating thrust. The sealing surface can be sealed solely by relying on the pressure of the medium, that is, by pressing the sealing surface of the gate towards the other side of the valve seat to ensure the sealing of the sealing surface, which is self sealing. Most stainless steel gate valves adopt forced sealing, which means that when the valve is closed, external force must be used to forcefully press the gate plate towards the valve seat to ensure the sealing surface is sealed.

Structural characteristics of stainless steel gate valves:

1. The selection of materials is meticulous, in accordance with relevant domestic and international standards, and the overall quality of the materials is high.

2. Meets the requirements of advanced domestic and international standards, with reliable sealing, excellent performance, and beautiful appearance.

3. The sealing pair is advanced and reasonable, and the sealing surfaces of the gate and valve seat are made of Stellite cobalt based hard alloy with different hardness by welding. The sealing is reliable, hard, wear-resistant, high-temperature resistant, corrosion-resistant, with good scratch resistance and long service life.

4. The valve stem has undergone quenching and surface nitriding treatment, which provides good corrosion resistance, scratch resistance, and wear resistance.

5. Adopting a wedge-shaped elastic gate structure, with thrust bearings installed on medium and large diameters, it has low friction and is equipped with an impact handwheel, making it easy to open and close.

Main external and structural dimensions (mm)

DN	L	D	D1	D2	b	f	z×ød	H	D0	kg
15	130	95	65	45	14	2	4×ø14	175	200	4
20	150	105	75	55	14	2	4×ø14	180	200	5
25	160	114	85	65	14	2	4×ø14	210	200	6
32	180	135	100	78	16	2	4×ø18	210	200	7
40	200	145	110	85	16	3	4×ø18	350	200	19
50	250	160	125	100	16	3	4×ø18	358	240	29
65	265	180	145	120	18	3	4×ø18	375	240	33
80	280	195	160	135	20	3	8×ø18	433	280	45
100	300	215	180	155	20	3	8×ø18	502	320	63
125	325	245	210	185	22	3	8×ø18	312	360	108
150	350	280	240	210	24	3	8×ø23	676	360	134
200	400	335	295	265	26	3	12×ø23	820	400	192
250	450	405	355	320	30	3	12×ø25	969	450	273
300	500	460	410	375	30	4	12×ø25	1142	560	379
350	550	520	470	435	34	4	16×ø25	1280	640	590
400	600	580	525	485	36	4	16×ø30	1452	640	850
450	650	640	585	545	40	4	20×ø30	1541	720	907
500	700	705	650	608	44	4	20×ø34	1676	720	958
600	800	840	770	718	48	5	20×ø41	1874	800	1112

DN	L	D	D1	D2	D8	b	z×ød	H	H1	D0	kg
20	150	105	75	55	51	16	4×ø14	256	438	240	29
25	160	115	85	65	58	16	4×ø14	275	452	240	33
32	180	135	100	78	66	18	4×ø18	285	530	280	46
40	200	145	110	85	76	18	4×ø18	320	620	320	63
50	250	160	125	100	88	20	4×ø18	371	438	240
65	280	180	145	120	110	22	8×ø18	393	452	240
80	310	195	160	135	121	22	8×ø18	455	530	280
100	350	230	190	160	150	24	8×ø23	551	620	320
125	400	270	220	188	176	28	8×ø25	634	765	360
150	450	300	250	218	204	30	8×ø25	708	845	360
200	550	375	320	282	260	38	12×ø30	858	1041	400
250	650	445	385	345	313	42	12×ø34	1015	1244	450
300	750	510	450	408	364	46	16×ø34	1145	1474	560
350	850	570	510	465	422	52	16×ø34	1280	1663	640
400	950	655	585	535	474	58	16×ø41	1450	1886	720	849