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First, the water seal valve product features

1, the use of flange bolts connection, both ends of the branch pipe flange connection or butt welding connection.
2, Stuffing box is designed into a water seal structure, access to 0.6 ~ 1.6Mpa water filler, small friction, sealed, the system can be isolated from the atmosphere, to ensure good air tightness.
3, the opening and closing pieces of double gate with two-way flexible seal, open and close easily, sealed, good performance.
4, the stem by quenching and nitriding surface treatment, good corrosion resistance, scratch resistance and wear resistance.
5, the structure is simple, compact and reasonable, easy maintenance, long life, handsome in appearance.
6, the valve work must be fully open or fully closed position, can not do with the control valve.

Second, the main components of water seal valve materials

Shell material	Suitable media	Applicable temperature ℃
Carbon steel (C)	Water, steam, oil	≤425
Chrome Nickel Stainless Steel (P)	Nitric acids	≤200
Chromium nickel molybdenum stainless steel (R)	Acetic acid	≤200
Chrome-molybdenum steel (I)	Water, steam, oil	≤550

Part Name	material
Body	WCB	ZG1Cr5Mo	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
Valve plate	WCB	1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
cap	WCB / 25	ZG1Cr5Mo	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
Valve stem	2Cr13	1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
filler	Vacuum combination filler
Stem nut	Aluminum bronze
Handwheel	Malleable iron

Third, water seal gate valve main dimensions

Nominal pressure	test pressure
Nominal pressure	case	Sealed (water)	Seal (gas)	Sealed (water)
1.6	2.4	1.8	0.6	1.8

Nominal pressure 1.6 MPa

DN	L1	L2	D	D1	D2	b	f	zd	Dn	A	B	H	H1	DO	RF	BW
50	250	216	160	125	100	16	3	4-18	49	57	66	398	458	250	28	24
65	270	241	180	145	120	18	3	4-18	66	73	83	438	514	250	40	35
80	280	283	195	160	135	20	3	8-18	78	89	96	456	539	300	55	50
100	300	305	215	180	155	20	3	8-18	96	108	117	514	614	300	75	66
125	325	381	245	210	185	22	3	8-18	121	133	144	600	750	350	110	96
150	350	403	280	240	210	24	3	8-23	146	159	172	680	825	350	150	133
200	400	419	335	295	265	26	3	12-23	202	219	222	800	1000	400	223	203
250	450	457	405	355	320	30	3	12-25	254	273	278	840	1080	450	325	295
300	500	502	460	410	375	30	4	12-25	303	325	330	990	1280	450	430	395
350	550	572	520	470	435	34	4	16-25	351	377	382	1135	1470	600	570	510
400	600	610	580	525	485	36	4	16-30	398	426	432	1410	1815	650	740	665
450	650	660	640	585	545	40	4	20-30	450	480	484	1475	1925	700	955	860
500	700	711	705	650	608	44	4	20-34	501	530	535	1660	2170	750	1195	1070
600	800	813	840	770	718	48	5	20-41	602	630	638	1950	2570	800	1455	1295
700	900	914	910	840	788	50	5	24-41	692	720	738	2165	2870	850	2110	1830
800	1000	965	1020	950	898	52	5	21-41	792	820	840	2595	3395	950	2630	2390

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The previous：Slag gate valve

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