Manual Cast Steel Flange Gate Valve

The opening and closing part of the manual cast steel flange gate valve is the gate. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully open and fully closed, and cannot be adjusted and throttled. The gate has two sealing faces. The two sealing faces of the most common mode gate valves form a wedge shape. The wedge angle varies with the valve parameters, usually 50, and is 2°52' when the medium temperature is not high.

Product Details

Overview

The opening and closing part of the manual cast steel flange gate valve is the gate. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The manual cast steel flange gate valve has two sealing surfaces. The two sealing surfaces of the most common gate valve form a wedge shape. The wedge angle varies with the valve parameters, generally 50°, and 2°52' when the medium temperature is not high.

Standard

Design specification: GB/T 12234

Structure length: GB/T 12221

Connection flange: JB/T 79.1

Test and inspection: JB/T 9092

Pressure-temperature: GB/T 9131

Product identification: GB/T 12220

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Nominal pressure PN (MPa)	Case	Test pressure (MPa)		Upper seal
Nominal pressure PN (MPa)	Case	Seal (liquid)	Sealed (gas)	Upper seal
1.6	2.4	1.8	0.6	1.8
2.5	3.8	2.8	0.6	2.8
4.0	6.0	4.4	0.6	4.4
6.4	9.6	7.0	0.6	7.0
10.0	15.0	11.0	0.6	11.0
16.0	24.0	18.0	0.6	18.0

Manual Cast Steel Flange Gate Valve Specification

Case Material	Applicable medium	Applicable temperature (°C)
Carbon steel (type C)	Water, steam, oil	≤425
Chrome nickel titanium steel (type C)	Nitric acid	≤200
Chrome nickel molybdenum titanium steel (type R)	Acetic acid	≤200
Chrome molybdenum steel (type I)	Water, steam, oil	≤550

Valve body、 bonnet	Valve plate、 valve seat	Valve stem	Stem nut	Filler	Hand wheel
Carbon steel	High quality carbon steel + hard alloy or stainless steel	Chrome stainless steel	Aluminum bronze	Graphite asbestos packing	Malleable cast iron
Chrome nickel titanium steel	Stainless steel, stainless steel + hard alloy	Chrome nickel titanium stainless steel	Aluminum bronze	PTFE	Malleable cast iron
Chrome nickel molybdenum titanium steel	Stainless steel, stainless steel + hard alloy	Chrome nickel titanium stainless steel	Aluminum bronze	PTFE	Malleable cast iron
Chrome-molybdenum steel	Alloy steel + hard alloy	Chrome-molybdenum steel	Aluminum bronze	Flexible asbestos	Malleable cast iron

Nominal diameter	Main dimensions and connection dimensions
Nominal diameter	L	D	D1	D2	b	Z-d	H	D0
Z41H-16C
15	130	95	65	45	14-2	4-Φ14	170	120
20	150	105	75	55	14-2	4-Φ14	190	140
25	160	115	85	65	14-2	4-Φ14	205	160
32	180	135	100	78	16-2	4-Φ18	270	180
40	200	145	110	85	16-3	4-Φ18	310	200
50	250	160	125	100	16-3	4-Φ18	358	240
65	265	180	145	120	18-3	4-Φ18	373	240
80	280	195	160	135	20-3	8-Φ18	435	280
100	300	215	180	155	20-3	8-Φ18	500	300
125	325	245	210	185	22-3	8-Φ18	614	320
150	350	280	240	210	24-3	8-Φ23	674	360
200	400	335	295	265	26-3	12-Φ23	811	400
250	450	405	355	320	30-3	12-Φ25	969	450
300	500	460	410	375	30-3	12-Φ25	1145	580
350	550	520	470	435	34-4	16-Φ25	1280	640
400	600	580	525	485	36-4	16-Φ30	1452	640
Z41H-25
15	130	95	65	45	16-2	4-Φ14	170	120
20	150	105	75	55	16-2	4-Φ14	190	140
25	160	115	85	65	16-2	4-Φ14	205	160
32	180	135	100	78	18-2	4-Φ18	270	180
40	200	145	110	85	18-3	4-Φ18	310	200
50	250	160	125	100	20-3	4-Φ18	358	240
65	265	180	145	120	22-3	8-Φ18	373	240
80	280	195	160	135	22-3	8-Φ18	435	280
100	300	230	190	160	24-3	8-Φ23	500	300
125	325	270	220	188	28-3	8-Φ25	614	320
150	350	300	250	218	30-3	8-Φ25	674	360
200	400	360	310	278	34-3	12-Φ25	811	400
250	450	425	370	332	36-3	12-Φ30	969	450
300	500	485	430	390	40-4	16-Φ30	1145	580
350	550	550	490	448	44-4	16-Φ34	1280	640
400	600	610	550	505	48-4	16-Φ34	1452	640

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