Pneumatic Knife Gate Valve

A pneumatic gate valve uses a pneumatic actuator to lift or lower a gate for controlling the flow of liquids or gases. It provides tight shut-off and minimal pressure drop, making it suitable for pipelines that require full, unobstructed flow. Pneumatic gate valves are commonly applied in oil and gas, water treatment, and power generation systems. The air-driven actuation ensures smooth and efficient operation, especially in remote or automated control environments.

Model: Z641(0) H (Y)

Bore: DN50~800mm

Pressure: 1.0, 1.6, 2.5, 4.0 MPa; 150Lb, 300Lb

Dimension Standard: Chinese Standard, ANSI

Body Material: Cast Iron, Carbon Steel(WCB), Stainless Steel (CF8, CF8M, CF3, CF3M)

Seat Material: Metal Sealed(H,Y)

Mode of Action: Double-acting

Mode of Control: Switch Type,

Adjust TypeAnnex Choice: Solenoid Valve, Locator, Limit Switch, F.R.L. Combination Unit,Manual Organization

Technique norm
Design Basis	GB Standard	ANSI Standard
Design standard	GB/12234	ANSI B16.34
Face to face dimension - Flange connecting	GB/12221	ANSI B16.10
Connecting Flange Size	GB/9113、JB/T79	ANSI B16.5(2~24")ANSI B16.47(28~30")
Test & inspection	JB/T9092	API 598

Note: The structural length and connecting flange size of Knife-shaped gate valve series can be designed and manufactured as per users' requirements.

Form of Main Parts Materials
No.	Name of parts	Material - C	Material - P	Material - R
1	Body	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
2	Screw Cap	35	304	304
3	Screw	35	304	304
4	Shut-off Device	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
5	Stem	1Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
6	Gasket	Stainless Steel+Graphite、PTFE
7	Cover	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
8	Bonnet	35	304	304
9	Lifting Ring Screw	35	304	304
10	Screw Cap	35	304	304
11	Screw	35	304	304
12	Packing	Graphite、PTFE
13	Packing Gland	WCB	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
14	Packing Plate	WCB	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
15	Screw Cap	35	304	304

Note: The main spare parts and sealed seat material of gate valve series can be de-signed for options as per users' special requirements.

Z6S41(0)H(Y)-PN16(1.6MPa) Main Outline and Connecting Flange Size
Nominal diameter DN	Outline Size					Connecting Size
Nominal diameter DN	L	~H	H₁	~H₂	Φdo	D	D₁	D₂	C	f	n-Φd
50	250	790	420	840	180	165	125	99	20	3	4-Φ18
80	280	910	460	990	200	200	160	132	20	3	8-Φ18
100	300	1050	560	1150	250	220	180	156	22	3	8-Φ18
150	350	1240	660	1390	320	285	240	211	24	3	8-Φ22
200	400	1520	810	1720	400	340	295	266	24	3	12-Φ22
250	450	1700	930	1950	400	405	355	319	26	3	12-Φ26
300	500	1930	1090	2230	450	460	410	370	28	4	12-Φ26
350	550	2160	1230	2510	450	520	470	429	30	4	16-Φ26
400	600	1330	1360	2730	500	580	525	480	32	4	16-Φ30
450	650	2540	1510	2990	500	640	585	548	34	4	20-Φ30
500	700	2750	1660	2150	550	715	650	609	36	4	20-Φ33
600	800	3080	1910	3680	550	840	770	720	38	5	20-Φ36
700	900	3570	2200	4270	600	910	840	794	40	5	24-Φ36
800	1000					1025	950	901	42	5	24-Φ39

Note: The main spare parts and sealed seat material of gate valve series can be de-signed for options as per users' special requirements.

Z6S41(0)H(Y)-PN25(2.5MPa) Main Outline and Connecting Flange Size
Nominal diameter DN	Outline Size					Connecting Size
Nominal diameter DN	L	~H	H₁	~H₂	Φdo	D	D₁	D₂	C	f	n-Φd
50	250	790	420	840	180	165	125	99	20	3	4-Φ18
80	280	910	460	990	200	200	160	132	24	3	8-Φ18
100	300	1050	560	1150	250	235	190	156	24	3	8-Φ22
150	350	1240	660	1390	320	300	250	211	28	3	8-Φ26
200	400	1520	810	1720	400	360	310	274	30	3	12-Φ26
250	450	1700	930	1950	400	425	370	330	32	3	12-Φ30
300	500	1930	1090	2230	450	485	430	389	34	4	16-Φ30
350	550	2160	1230	2510	450	555	490	448	38	4	16-Φ33
400	600	2330	1360	2730	500	620	550	503	40	4	16-Φ36
450	650	2540	1510	2990	500	670	600	548	42	4	20-Φ36
500	700	2750	1660	3250	550	730	660	609	44	4	20-Φ36
600	800	3080	1910	3680	550	845	770	720	46	4	20-Φ39
700	900	3570	2200	4270	600	960	875	820	50	5	24-Φ42
800	1000					1085	990	928	54	5	24-Φ48

Z6S41(0)H(Y)-PN40(4.0MPa) Main Outline and Connecting Flange Size
Nominal diameter DN	Outline Size					Connecting Size
Nominal diameter DN	L	~H	H₁	~H₂	Φdo	D	D₁	D₂	C	D₃×X	f	n-Φd
50	250	790	420	840	180	165	125	99	20	88×4	3	4-Φ18
80	310	910	460	990	200	200	160	132	24	121×4	3	8-Φ18
100	350	1050	560	1150	250	235	190	156	24	150×4.5	3	8-Φ22
150	450	1240	660	1390	320	300	250	211	28	204×4.5	3	8-Φ26
200	550	1520	810	1720	400	375	320	284	34	260×4.5	3	12-Φ30
250	650	1700	930	1950	400	450	385	315	38	313×4.5	3	12-Φ33
300	750	1930	1090	2230	450	515	450	409	42	364×4.5	4	16-Φ33
350	850	2160	1230	2510	450	580	510	465	46	422×5	4	16-Φ36
400	950	2330	1360	2730	500	660	585	535	50	474×5	4	16-Φ39
450	1050	2540	1510	2990	500	685	610	560	50	524×5	4	20-Φ39
500	1150	2750	1660	3250	550	755	670	615	52	576×5	4	20-Φ42
600	1350	3080	1910	3680	550	890	795	735	60	676×5	5	20-Φ48

Note: The relative sizes are subject to change responding to difference in valve torque, medium and actuator model.

Z6S41(0)H(Y)-Class 150 Main Outline and Cinnecting Flange Size
Nominal diameter		Outline Size					Connecting Size
DN	in	L	~H	H₁	~H₂	Φdo	D	D₁	D₂	C	f	n-Φd
50	2	178	790	420	840	180	152	120.5	92	16	2	4-Φ19
80	3	203	910	460	990	200	190	152.5	127	19	2	4-Φ19
100	4	229	1050	560	1150	250	229	190.5	157	24	2	8-Φ19
150	6	267	1240	660	1390	320	279	241.5	216	26	2	8-Φ22
200	8	292	1520	810	1720	400	343	298.5	270	29	2	8-Φ22
250	10	330	1700	930	1950	400	406	362	324	31	2	12-Φ25
300	12	256	1930	1090	2230	450	483	432	381	32	2	12-Φ25
350	14	381	2160	1230	2510	450	533	476	413	35	2	12-Φ29
400	16	406	2330	1360	2730	500	597	540	470	37	2	16-Φ29
450	18	432	2540	1510	2990	500	635	578	533	40	2	16-Φ32
500	20	457	2750	1660	3250	550	699	635	584	43	2	20-Φ32
600	24	508	3080	1910	3680	550	813	749.5	692	48	2	20-Φ35
700	28	610	3570	2200	4270	600	947	863.6	800	45	2	28-Φ35
800	32	660					1060	978	914	46	2	28-Φ41

Z6S41(0)H(Y)-Class 300 Main Outline and Cinnecting Flange Size
Nominal diameter		Outline Size					Connecting Size
DN	in	L	~H	H₁	~H₂	Φdo	D	D₁	D₂	C	f	n-Φd
50	2	216	790	420	840	180	165	127	92	23	2	8-Φ19
80	3	283	910	460	990	200	210	168.5	127	29	2	8-Φ22
100	4	305	1050	560	1150	250	254	200	157	32	2	8-Φ22
150	6	403	1240	660	1390	320	318	270	216	37	2	12-Φ22
200	8	419	1520	810	1720	400	381	330	270	42	2	12-Φ25
250	10	457	1700	930	1950	400	445	387.5	324	48	2	16-Φ29
300	12	502	1930	1090	2230	450	521	451	381	51	2	16-Φ32
350	14	762	2160	1230	2510	450	584	514.5	413	54	2	20-Φ32
400	16	838	2330	1360	2730	500	648	571.5	470	58	2	20-Φ35
450	18	914	2540	1510	2990	500	711	628.5	533	61	2	24-Φ35
500	20	991	2750	1660	3250	550	775	686	584	64	2	24-Φ35
600	24	1143	3080	1910	3680	550	914	813	692	70	2	24-Φ41
700	28						1035	940	800	89	2	28-Φ45
800	32						1149	1054	914	103	2	28-Φ51

Note: The relative sizes are subject to change responding to difference in valve torque, medium and actuator model.

Technique norm
Design Basis	Standard (GB)	Standard (ANSI)
Design standard	JB/T8691-1998	ANSI B16.34
Connecting Flange Size	GB/9113、JB/T79	ANSI B16.5
Test & inspection	JB/T9092	API 598

Note: The structural length and connecting flange size of Knife-shaped gate valve series can be designed and manufactured as per users' requirements.

Form of Main Parts Materials
No.	Name of parts	Material - C	Material - P	Material - R
1	Inner Hexagon Screw	1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
2	Bonnet	WCB	1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
3	Gasket	PTFE	PTFE	PTFE
4	Seat	1Cr18Ni9Ti PTFE、Rubber	1Cr18Ni9Ti PTFE、Rubber	1Cr18Ni12Mo2Ti PTFE、Rubber
5	Body	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
6	Packing Material	PTFE Nitrile Rubber or PTFE	PTFE Nitrile Rubber or PTFE	PTFE Nitrile Rubber or PTFE
7	Gland	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
8	Shut-off Device	1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
9	Yoke	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni9Ti
10	Push-and-pull Rod	45#Steel Crome Plating	45#Steel Crome Plating	45#Steel Crome Plating
11	Pneumatic Actuator	ZTQD Series	ZTQD Series	ZTQD Series

Note: The main spare parts and sealed seat material of gate valve series can be de-signed for options as per users' special requirements.

PZ673H(F、X)-PN10(1.0MPa) Main Outline and Connecting Flange Size
Nominal diameter DN	L	D	D₁	D₂	Do	N-Th	d	H₁
50	48	165	125	99	180	4-M16	Φ18	460
65	48	185	145	118	200	4-M16	Φ18	520
80	51	200	160	132	220	8-M16	Φ18	570
100	51	220	180	156	240	8-M16	Φ18	680
125	57	250	210	184	260	8-M16	Φ18	780
150	57	285	240	212	280	8-M20	Φ23	850
200	70	340	295	266	300	8-M20	Φ23	980
250	70	395	350	319	340	12-M20	Φ23	1140
300	76	445	400	370	380	12-M20	Φ23	1360
350	76	505	460	430	400	16-M20	Φ23	1460
400	89	565	515	480	450	16-M24	Φ27	1630
450	89	615	565	530	530	20-M24	Φ27	1770
500	114	670	620	582	600	20-M24	Φ27	1960
600	114	780	725	682	600	20-M27	Φ30	2245
700	127	895	840	794	680	24-M27	Φ30	2600
800	127	1015	950	901	680	24-M30	Φ33	2910
900	203(127)	1115	1050	1001		28-M30	Φ33	3200
1000	216(149)	1230	1160	1112		28-M33	Φ36	3550
1200	254(156)	1455	1380	1328		32-M36	Φ39	4250

Note: The relative sizes are subject to change responding to difference in valve torque, medium and actuator model.

PZ673H(F、X)-Class150 Main Outline and Connecting Flange Size
Nominal diameter
DN	in	L	D	D₁	D₂	Do	N-Th	d	H₁
50	2"	48	152	120	92	180	4-M5/8-11	Φ19	460
65	2.5"	48	178	139.5	105	200	4-M5/8-11	Φ19	520
80	3"	51	190.5	152.5	127	220	4-M5/8-11	Φ19	570
100	4"	51	220.5	190.5	157	240	8-M5/8-11	Φ19	680
125	5"	57	254	216	186	260	8-M3/4-10	Φ22	780
150	6"	57	279	241.5	216	280	8-M3/4-10	Φ22	850
200	8"	70	343	298.5	270	300	8-M3/4-10	Φ22	980
250	10"	70	406	362	324	340	12-M7/8-9	Φ25	1140
300	12"	76	483	432	381	380	12-M7/8-9	Φ25	1360
350	14"	76	533	476	413	400	12-M1-8	Φ29	1460
400	16"	89	597	539.5	470	450	16-M1-8	Φ29	1630
450	18"	89	635	578	533	530	16-M118/-7	Φ32	1770
500	20"	114	699	635	584	600	20-M118/-7	Φ32	1960
600	24"	114	813	749.5	691	600	20-M11/4-7	Φ35	2245
750	30"	144	984	914.5	857	680	28-M11/4-7	Φ35	2120
900	36"	203(127)	1168	1086	1022	680	32-M11/2-6	Φ41	2500
1050	42"	216(149)	1346	1257.5	1193		36-M11/2-6	Φ41	2800
1200	48"	254(156)	1511	1422.5	1358		44-M11/2-6	Φ41	3300

Note: The relative sizes are subject to change responding to difference in valve torque, medium and actuator model.

PZ673H(F、X)-PN10(1.0MPa) Main Outline and Connecting Flange Size
Nominal diameter DN	L	D	D₁	D₂	Do	N-Th	d	H₁
50	48	165	125	99	180	4-M16	Φ18	463
65	48	185	145	118	200	4-M16	Φ18	534
80	51	200	160	132	220	8-M16	Φ18	608
100	51	220	180	156	240	8-M16	Φ18	735
125	57	250	210	184	260	8-M16	Φ18	845
150	57	285	240	212	280	8-M20	Φ23	942
200	70	340	295	266	300	8-M20	Φ23	1110
250	70	395	350	319	340	12-M20	Φ23	1323
300	76	445	400	370	380	12-M20	Φ23	1556
350	76	505	460	430	400	16-M20	Φ23	1711
400	89	565	515	480	450	16-M24	Φ27	1900
450	89	615	565	530	530	20-M24	Φ27	2075
500	114	670	620	582	600	20-M24	Φ27	2283
600	114	780	725	682	600	20-M27	Φ30	2662
700	127	895	840	794	680	24-M27	Φ30	3039
800	127	1015	950	901	680	24-M30	Φ33	3410
900	203(127)	1115	1050	1001		28-M30	Φ33	3723
1000	216(149)	1230	1160	1112		28-M33	Φ36	4113
1200	254(156)	1455	1380	1328		32-M36	Φ39	4850

Note: The relative sizes are subject to change responding to difference in valve torque, medium and actuator model.