Knife Gate Valve

1.Wafer Knife Gate Valve

Technique Standard

Design Basis	GB Standard	ANSI Standard
Design Standard	JB/T 8691-1998	ANSI B16.34
Connecting Flange Size	GB/T 9113, JB/T 79	ANSI B16.5
Test & Inspection	JB/T 9092	API 598

Form of Main Parts Materials

Name of Parts	C	P	R
Inner Hexagon Screw	1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Bonnet	WCB	1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
Gasket	PTFE	PTFE	PTFE
Seat	1Cr18Ni9Ti or PTFE, Rubber	1Cr18Ni9Ti or PTFE, Rubber	1Cr18Ni12Mo2Ti or PTFE, Rubber
Body	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
Packing Material	PTFE Nitrile Rubber or PTFE	PTFE Nitrile Rubber or PTFE	PTFE Nitrile Rubber or PTFE
Gland	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
Shut-off Device	1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Yoke	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni9Ti
Push-and-pull Rod	45# Steel Chrome Plating	45# Steel Chrome Plating	45# Steel Chrome Plating
Pneumatic Actuator	ZTQD Series	ZTQD Series	ZTQD Series

Pneumatic Knife Gate Valve Standard Specification

Model	ZTB(C)Z673H(F, X)
Bore	DN50~800mm
Pressure	0.6, 1.0, 1.6, 2.5 MPa; 150Lb, 300Lb
Dimension Standard	GB, American Standard
Body Material	Cast Iron, Carbon Steel (WCB), Stainless Steel (CF8, CF8M, CF3, CF3M)
Seat Material	Metal Sealed (H, Y), PTFE (F), NBR (X)
Mode of Action	Double-acting / Single-acting type (spring reposition) of pneumatic actuator
Control	Switch type, Adjust type, Intelligent
Selection of Accessories	Solenoid valve, Locator, Limit switch, F.R.L Combination Unit, Manual Device

Electric Knife Gate Valve Standard Specification

Model	ZTB(C)Z973H(F, X)
Bore	DN50~800mm
Pressure	0.6, 1.0, 1.6, 2.5 MPa; 150Lb, 300Lb
Dimension Standard	GB, American Standard
Body Material	Cast Iron, Carbon Steel (WCB), Stainless Steel (CF8, CF8M, CF3, CF3M)
Seat Material	Metal Sealed (H, Y), PTFE (F), NBR (X)
Mode of Action	Power on type, Power off type
Control	Switch type, Adjust type, Intelligent

Wafer Knife Gate Valve

Main Outline and Connecting Flange Size

DN	in	L	D	D1	D2	N-Th	d	H1	Pneumatic Actuator (Double Acting)
50	2	48	165	125	99	4-M16	Φ18	460	ZTCL-100
65	2 1/2	48	185	145	118	4-M16	Φ18	520	ZTCL-130
80	3	51	200	160	132	8-M16	Φ18	570	ZTCL-140
100	4	51	220	180	156	8-M16	Φ18	680	ZTCL-160
125	5	57	250	210	184	8-M16	Φ18	780	ZTCL-160
150	6	57	285	240	212	8-M20	Φ23	850	ZTCL-200
200	8	70	340	295	266	8-M20	Φ23	980	ZTCL-220
250	10	70	395	350	319	12-M20	Φ23	1140	ZTCL-250
300	12	76	445	400	370	12-M20	Φ23	1360	ZTCL-300
350	14	76	505	460	430	16-M20	Φ23	1460	ZTCL-250(SG)
400	16	89	565	515	480	16-M24	Φ27	1630	ZTCL-250(SG)
450	18	89	615	565	530	20-M24	Φ27	1770	ZTCL-300(SG)
500	20	114	670	620	582	20-M24	Φ27	1960	ZTCL-350(SG)
600	24	114	780	725	682	20-M27	Φ30	2245	ZTCL-400(SG)
700	28	127	895	840	794	24-M27	Φ30	2600	ZTCL-450(SG)
800	32	127	1015	950	901	24-M30	Φ33	2910	ZTCL-500(SG)
900	36	203(127)	1115	1050	1001	28-M30	Φ33	3200	ZTCL-550(SG)
1000	40	216(149)	1230	1160	1112	28-M33	Φ36	3550	ZTCL-600(SG)
1200	48	254(156)	1455	1380	1328	32-M36	Φ39	4250	ZTCL-650(SG)

2.Through Type Knife Gate Valve

Through Type Knife Gate Valve

Main Outline and Connecting Flange Size

ZZTCZ673H(F/X)-PN10(1.0MPa)

DN	in	L	D	D1	D2	N-Th	d	H1	Pneumatic Actuator (Double Acting)
50	2	48	165	125	99	4-M16	Φ18	463	ZTCL-100
65	2 1/2	48	185	145	118	4-M16	Φ18	534	ZTCL-130
80	3	51	200	160	132	8-M16	Φ18	608	ZTCL-140
100	4	51	220	180	156	8-M16	Φ18	735	ZTCL-160
125	5	57	250	210	184	8-M16	Φ18	845	ZTCL-160
150	6	57	285	240	212	8-M20	Φ23	942	ZTCL-200
200	8	70	340	295	266	8-M20	Φ23	1110	ZTCL-220
250	10	70	395	350	319	12-M20	Φ23	1323	ZTCL-250
300	12	76	445	400	370	12-M20	Φ23	1556	ZTCL-300
350	14	76	505	460	430	16-M20	Φ23	1711	ZTCL-250(SG)
400	16	89	565	515	480	16-M24	Φ27	1900	ZTCL-250(SG)
450	18	89	615	565	530	20-M24	Φ27	2075	ZTCL-300(SG)
500	20	114	670	620	582	20-M24	Φ27	2283	ZTCL-350(SG)
600	24	114	780	725	682	20-M27	Φ30	2662	ZTCL-400(SG)
700	28	127	895	840	794	24-M27	Φ30	3039	ZTCL-450(SG)
800	32	127	1015	950	901	24-M30	Φ33	3410	ZTCL-500(SG)
900	36	203(127)	1115	1050	1001	28-M30	Φ33	3723	ZTCL-550(SG)
1000	40	216(149)	1230	1160	1112	28-M33	Φ36	4113	ZTCL-600(SG)
1200	48	254(156)	1455	1380	1328	32-M36	Φ39	4850	ZTCL-650(SG)

ZTCZ673H(F/X)-Class150

Nominal Diameter (DN)	Inch	L	D	D1	D2	Bolt Holes (N-Th)	Hole Dia (d)	H1	Pneumatic Actuator (Double Action)
50	2	48	152	120	92	4-M5/8-11	Φ19	463	ZTCL-100
65	2 1/2	48	178	139.5	105	4-M5/8-11	Φ19	534	ZTCL-130
80	3	51	190.5	152.5	127	4-M5/8-11	Φ19	608	ZTCL-140
100	4	51	220.5	190.5	157	8-M5/8-11	Φ19	735	ZTCL-160
125	5	57	254	216	186	8-M3/4-10	Φ22	845	ZTCL-160
150	6	57	279	241.5	216	8-M3/4-10	Φ22	942	ZTCL-200
200	8	70	343	298.5	270	8-M3/4-10	Φ22	1110	ZTCL-220
250	10	70	406	362	324	12-M7/8-9	Φ25	1323	ZTCL-250
300	12	76	483	432	381	12-M7/8-9	Φ25	1556	ZTCL-300
350	14	76	533	476	413	12-M1-8	Φ29	1711	ZTCL-250(SG)
400	16	89	597	539.5	470	16-M1-8	Φ29	1900	ZTCL-250(SG)
450	18	89	635	578	533	16-M1 1/8-7	Φ32	2075	ZTCL-300(SG)
500	20	114	699	635	584	20-M1 1/8-7	Φ32	2283	ZTCL-350(SG)
600	24	114	813	749.5	691	20-M1 1/4-7	Φ35	2662	ZTCL-400(SG)
750	30	144	984	914.5	857	28-M1 1/4-7	Φ35	3039	ZTCL-450(SG)
900	36	203(127)	1168	1086	1022	32-M1 1/2-6	Φ41	3410	ZTCL-500(SG)
1050	42	216(149)	1346	1257.5	1193	36-M1 1/2-6	Φ41	3723	ZTCL-550(SG)
1200	48	254(156)	1511	1422.5	1358	44-M1 1/2-6	Φ41	4113	ZTCL-600(SG)

3.Pneumatic Ceramic Knife Gate Valve

Technical Specification

Design and Manufacture	JB/T 10529
Face to Face (Connection End)	GB/T 12221
Flange End (Connection End)	GB/T 9113
Inspection & Test	Manufacturer Standard (MFR Standard)
Mark	GB/T 12220
Delivery	GB/T 12252

Main Component Materials

No.	Name	Material	No.	Name	Material
1	Body	WCB	7	Stem	2Cr13
2	Seat	Engineering Ceramic	8	Stem Nut	Copper Alloy
3	Disc	Stainless Steel + Tungsten Carbide	9	Handwheel	KTH330
4	Packing	Graphite Packing	10	Lock Nut	45#
5	Packing Gland	WCB	11	Stud	35CrMo
6	Yoke	WCB	12	Bolt	45#

Main Outline and Connecting Size

DN	L	PN10 D	PN10 D1	PN10 D2	PN10 N-M	PN10 Z-d	PN16 D	PN16 D1	PN16 D2	PN16 N-M	PN16 Z-d
50	50	165	125	102	2-M16	2-18	165	125	102	2-M16	2-18
65	50	185	145	122	2-M16	2-18	185	145	122	2-M16	2-18
80	50	200	160	138	2-M16	6-18	200	160	138	2-M16	6-18
100	52	220	180	158	2-M16	6-18	220	180	158	2-M16	6-18
125	56	250	210	188	2-M16	6-18	250	210	188	2-M16	6-18
150	56	285	240	212	2-M20	6-22	285	240	212	2-M20	6-22
200	60	340	295	268	2-M20	6-22	340	295	268	4-M20	8-22
250	78	395	350	320	4-M20	8-22	405	355	320	4-M24	8-26
300	78	445	400	370	4-M20	8-22	460	410	378	4-M24	8-26
350	78	505	460	430	6-M20	10-22	520	470	438	6-M24	10-26
400	102	565	515	482	6-M24	10-26	580	525	490	6-M27	10-30
450	114	615	565	532	8-M24	12-26	640	585	550	8-M27	12-30
500	127	670	620	585	8-M24	12-26	715	650	610	8-M30	12-33
600	154	780	725	685	8-M27	12-30	840	770	725	8-M33	12-36

Pneumatic Ceramic Knife Gate Valve

3.Bonnetless Type Knife Gate Valve

Chief Features

Face–to–face dimensions adopt short series, and light weight valve is adopted, so as to save pipe supporter.
During the opening and closing of the valve, the gate disc can automatically scrape off the adhered medium and is beneficial to sealing.
The blade type gate disc helps medium cut off and residue discharge so that the valve can be operated without blocking.
The valve adopts wafer type connection.
The wedge type limit stopper can provide sealing force, reliable sealing.
The guide nail can provide good guiding function.
The anti–abrasive bushings of different materials can be provided according to requirements so as to prolong the service life of the valve.
Actuators (electric, gear box, pneumatic, hydraulic) can be freely selected.

Product Specification

Design Spec.	Face to Face	Flange End	Test & Check	Marking	Supply
JB/T 8691	GB/T 12221	JB/T 79	JB/T 8691	GB/T 12220	JB/T 7928
MSS SP-81	MSS SP-81	ASME B16.5	MSS SP-81	MSS SP-25	MSS SP-81

Main Part Material

Part Name	Main Body Material	Code
Body/Bonnet	Carbon steel / Stainless steel	C.S / S.S
Disc	Stainless steel	S.S
Stem	Stainless steel	S.S
Packing	Rubber / PTFE / Graphite	ASB / PTFE / Graphite
Suitable Temp	-29°C ~ +425°C
Suitable Medium	Paper pulp, mixture of sewage, coal slurry, ash and seroflux

Bonnetless Type Knife Gate Valve

Main Dimension

Unit:mm

Type	Nominal Diameter (DN)	L	D	D1	D2	N-M	Z-Φd	H	WT (kg)
PZ73X-10C / PZ73F-10C / PZ73H-10C / PZ73Y-10C	50	50	160	125	100	2-M16	2-Φ18	285	11
	65	50	180	145	120	2-M16	2-Φ18	295	12
	80	50	195	160	135	2-M16	2-Φ18	315	15
	100	52	215	180	155	2-M16	6-Φ18	365	16
	125	56	245	210	185	2-M16	6-Φ18	400	30
	150	56	280	240	210	2-M20	6-Φ23	475	49
	200	60	390	295	265	2-M20	6-Φ23	540	58
	250	78	440	350	320	4-M20	8-Φ23	630	95
	300	78	500	400	368	4-M20	8-Φ23	780	430
	350	78	565	460	428	6-M20	10-Φ23	885	149
	400	102	615	515	482	6-M22	10-Φ25	990	225
	450	114	670	565	532	8-M22	12-Φ25	1100	345
	500	127	780	620	585	8-M22	12-Φ25	1200	440
	600	154	895	725	685	8-M27	12-Φ30	1450	590
	700	165	1010	840	800	10-M27	14-Φ30	1950	855
	800	190	—	950	905	10-M30	14-Φ34	2450	970

Type	Nominal Diameter	L	D	D1	D2	N-M	Z-Φd	H	WT (kg)
PZ43X-150Lb / PZ43F-150Lb / PZ43H-150Lb / PZ43Y-150Lb	2	48	115	125	92	2-M16	2-Φ18	285	11
	2 1/2	48	178	145	105	2-M16	2-Φ18	295	12
	3	51	190	160	127	2-M16	2-Φ18	315	15
	4	51	229	180	157	2-M16	6-Φ18	365	16
	5	57	254	210	186	2-M20	6-Φ22	400	30
	6	57	279	240	216	2-M20	6-Φ22	475	49
	8	70	343	295	270	2-M20	6-Φ22	540	58
	10	70	406	350	324	4-M22	8-Φ25	630	95
	12	76	480	400	381	4-M22	8-Φ25	780	430
	14	76	533	460	413	4-M27	8-Φ30	885	149
	16	89	597	515	470	6-M27	10-Φ30	990	225
	18	89	635	565	533	6-M30	10-Φ33	1100	345
	20	114	699	620	584	8-M30	12-Φ33	1200	440
	24	114	813	725	692	8-M33	12-Φ36	1450	590
	30	117	985	840	857	12-M33	16-Φ36	1950	855
	36	117	1170	950	1022	14-M39	18-Φ42	2450	970

4.Bonneted Knife Gate Valve

Bonneted Type Knife Gate Valve

Main Dimension

Type	Nominal Diameter (DN)	L	D	D1	D2	N-M	Z-Φd	H	WT (kg)
PFZ73X-10C / PFZ73F-10C / PFZ73H-10C / PFZ73Y-10C	50	50	160	125	100	2-M16	2-Φ18	370	13.5
	65	50	180	145	120	2-M16	2-Φ18	400	14.5
	80	52	195	160	135	2-M16	2-Φ18	475	17
	100	52	215	180	155	2-M16	6-Φ18	540	22
	125	56	245	210	185	2-M16	6-Φ18	630	27.6
	150	56	280	240	210	2-M20	6-Φ23	780	37.5
	200	60	335	295	265	2-M20	6-Φ23	885	51
	250	78	390	350	320	4-M20	8-Φ23	990	74
	300	78	440	400	368	4-M20	8-Φ23	1100	90
	350	78	500	460	428	6-M20	10-Φ23	1200	113
	400	102	565	515	482	6-M22	10-Φ25	1450	156
	450	114	615	565	532	8-M22	12-Φ25	1650	240
	500	127	670	620	585	8-M22	12-Φ25	1900	310
	600	154	780	725	685	8-M27	12-Φ30	2100	448
	700	165	895	840	800	10-M27	14-Φ30	2480	560
	800	190	1010	950	905	10-M30	14-Φ34	2900	700

Type	Nominal Diameter	L	D	D1	D2	N-M	Z-Φd	H	WT (kg)
PFZ43X-150Lb / PFZ43F-150Lb / PFZ43H-150Lb / PFZ43Y-150Lb	2	48	152	120.5	92	2-M16	2-Φ19	365	13.5
	2 1/2	48	178	139.5	105	2-M16	2-Φ19	400	14.5
	3	51	190	152.5	127	2-M16	2-Φ19	475	17
	4	51	229	190.5	157	2-M16	6-Φ19	540	22
	5	57	254	216	186	2-M20	6-Φ23	630	27.6
	6	57	279	241.5	216	2-M20	6-Φ23	780	37.5
	8	70	343	298.5	270	2-M20	6-Φ23	885	51
	10	70	406	362	324	4-M22	8-Φ25	990	74
	12	76	480	432	381	4-M22	8-Φ25	1100	90
	14	76	533	476	413	4-M27	8-Φ30	1200	113
	16	89	597	540	470	6-M27	10-Φ30	1450	156
	18	89	635	578	533	6-M30	10-Φ30	1650	240
	20	114	699	635	584	8-M30	12-Φ30	1900	310
	24	114	813	749.5	692	8-M33	12-Φ30	2100	448
	30	117	985	914	857	8-M33	12-Φ30	2600	560
	36	117	1170	1086	1022	14-M39	18-Φ42	3200	700

5.WPZ Knife Gate Valve

WPZ Knife Gate Valve

Main Dimension

Type	Nominal Diameter (DN)	L	D	D1	D2	N-M	D0	H	WT (kg)
WPZ73X-10C	50	48	165	125	102	4-M16	200	285	8
	65	48	180	145	120	4-M16	200	350	9
	80	51	195	160	135	4-M16	200	467	11
	100	51	215	180	155	8-M16	220	550	14
	125	57	245	210	185	8-M16	240	605	20
	150	60	280	240	210	8-M20	280	645	28
	200	60	335	295	265	8-M20	320	840	38
	250	70	390	350	320	12-M20	360	1015	66
	300	78	440	400	368	12-M20	360	1165	97
	350	78	500	460	428	16-M20	400	1345	110
	400	89	565	515	482	16-M22	500	1495	190
	450	89	615	565	532	20-M22	500	1650	285
	500	114	670	620	585	20-M22	600	1805	385

6.Eccentric Non-rising Stem Knife Gate Valve

Eccentric Non-rising Stem Knife Gate Valve

Main Dimension

Type	Nominal Diameter (DN)	L	D	D1	D2	N-M	Z-Φd	H	WT (kg)
PZ75X-10C / PZ75F-10C / PZ75H-10C / PZ75Y-10C	50	50	160	125	100	2-M16	2-Φ18	285	11
	65	50	180	145	120	2-M16	2-Φ18	295	12
	80	50	195	160	135	2-M16	2-Φ18	315	15
	100	52	215	180	155	2-M16	6-Φ18	365	16
	125	56	245	210	185	2-M16	6-Φ18	400	30
	150	56	280	240	210	2-M20	6-Φ23	475	49
	200	60	335	295	265	2-M20	6-Φ23	540	58
	250	78	390	350	320	4-M20	8-Φ23	630	95
	300	78	440	400	368	4-M20	8-Φ23	780	430
	350	78	500	460	428	6-M20	10-Φ23	885	149
	400	102	565	515	482	6-M22	10-Φ25	990	225
	450	114	615	565	532	8-M22	12-Φ25	1100	345
	500	127	670	620	585	8-M22	12-Φ25	1200	440
	600	154	780	725	685	8-M27	12-Φ30	1450	590
	700	165	895	840	800	10-M27	14-Φ30	1950	855
	800	190	1010	950	905	10-M30	14-Φ34	2450	970

7.SCZ Through-Conduit Knife Gate Valve

SCZ Through-Conduit Knife Gate Valve

Main Dimension

Type	Nominal Diameter (DN)	L	D	D1	D2	N-M	Z-Φd	H	WT (kg)
SCZ673F-10P	50	48	160	125	100	4-M16	—	397	11
	65	48	180	145	120	4-M16	—	418	12
	80	52	195	160	135	4-M16	—	560	14
	100	66	215	180	155	4-M16	4-Φ18	602	16
	125	68	245	210	185	4-M16	4-Φ18	690	17
	150	68	280	240	210	4-M20	4-Φ23	927	24
	200	76	335	295	265	4-M20	4-Φ23	1025	28
	250	80	390	350	320	8-M20	4-Φ23	1025	35
	300	80	440	400	368	8-M20	4-Φ23	1253	65
	350	80	500	460	428	12-M22	4-Φ25	1325	85
	400	102	565	515	482	12-M22	4-Φ25	1420	125

8.Ceramic-lined Knife Gate Valve

Chief Features

This valve is suitable for pipelines in mining, coal washing plants, power plant dry ash systems, and bin pump discharge conveying systems, and is used for opening and closing media containing abrasive dry powder, ore, and slag-water mixtures.
Working pressure: ≤ 1.0 MPa.
Applicable temperature: ≤ 425 °C.
The valve body is made of carbon steel castings, the valve seat is lined with a ceramic ring, and the valve plate is carbide treated. This valve features excellent sealing performance, strong wear resistance, and long service life.

Ceramic-lined Knife Gate Valve

Main Dimension

Type	Nominal Diameter (DN)	L	D	D1	D2	N-M	Z-Φd	H	WT (kg)
PZ73TC-10C	50	50	160	125	100	2-M16	2-Φ18	285	11
	65	50	180	145	120	2-M16	2-Φ18	295	12
	80	50	195	160	135	2-M16	2-Φ18	315	15
	100	52	215	180	155	2-M16	6-Φ18	365	16
	125	56	245	210	185	2-M16	6-Φ18	400	30
	150	56	280	240	210	2-M20	6-Φ23	475	49
	200	60	335	295	265	2-M20	6-Φ23	540	58
	250	78	390	350	320	4-M20	8-Φ23	630	95
	300	78	440	400	368	4-M20	8-Φ23	780	430
	350	78	500	460	428	6-M20	10-Φ23	885	149
	400	102	565	515	482	6-M22	10-Φ25	990	225
	450	114	615	565	532	8-M22	12-Φ25	1100	345
	500	127	670	620	585	8-M22	12-Φ25	1200	440
	600	154	780	725	685	8-M27	12-Φ30	1450	590
	700	165	895	840	800	10-M27	14-Φ30	1950	855
	800	190	1010	950	905	10-M30	14-Φ34	2450	970

9.Fully Polyurethane-lined Knife Gate Valve

This valve is suitable for use in pipelines of mining, coal washing plants, and power plant dry ash systems for opening and closing media containing abrasive dry powder, ore, and slag-water mixtures.
Working pressure: ≤ 1.0 MPa
Applicable temperature: ≤ 80 °C
The valve body is made of WCB cast steel and the inner lining is epoxy resin. The valve features good sealing performance, strong wear resistance, and long service life.

Fully Polyurethane-lined Knife Gate Valve

Main Dimension

Type	Nominal Diameter (DN)	L	D1	D2	N-M	Z-Φd
NCPZ73DX-10C	80	56	160	132	2-M16	6-Φ18
	100	60	180	156	2-M16	6-Φ18
	125	60	210	184	2-M16	6-Φ18
	150	60	240	211	2-M20	6-Φ22
	200	70	295	266	2-M20	6-Φ22
	250	70	350	319	4-M20	8-Φ22
	300	80	400	370	4-M20	8-Φ22

10.Cast Iron Knife Gate Valve

Cast Iron Knife Gate Valve

Main Dimension

Type	Nominal Diameter (DN)	L	D	D2	N-M	D0	H	WT (kg)
WPZ73X-10Q	50	40	125	100	4-M16	200	312	8
	65	40	145	120	4-M16	200	355	9.5
	80	50	160	135	8-M16	200	363	13
	100	50	180	155	8-M16	220	406	15
	125	50	210	185	8-M16	240	456	24
	150	60	240	210	8-M20	280	517	26.5
	200	60	295	265	8-M20	320	616	40
	250	70	350	320	12-M20	360	775	78
	300	70	400	368	12-M20	360	879	80
	350	96	460	428	16-M20	400	1015	205
	400	100	515	482	16-M22	500	1115	265
	450	106	565	532	20-M22	500	1218	315
	500	110	620	585	20-M22	600	1325	385
	600	120	725	685	20-M27	600	1456	435

Manufacturing Process

Step 1: Order and Design

Confirm the customer’s requirements, including size, pressure rating, material, operation type, and working conditions. Based on these details, the engineering team prepares the design drawing and production plan for the knife gate valve.

Knife Gate Valve

Step 2: Forging & Casting

The main body, bonnet, gate, and other key parts of the knife gate valve are produced by casting or forging according to the material specification. After that, raw parts are inspected to ensure there are no defects such as cracks, shrinkage, or porosity.

Knife Gate Valve

Step 3: Machining

All major components are machined with CNC or conventional machines. This includes body cavity machining, seat area finishing, gate guide slot processing, flange drilling, and stem connection machining, to ensure the knife gate valve meets dimensional and sealing requirements.

Knife Gate Valve

Step 4: Assembly

After cleaning and inspection, the valve body, gate, seat, stem, packing, actuator, and other parts are assembled step by step. Proper assembly is essential to ensure the knife gate valve operates smoothly and seals reliably.

Knife Gate Valve

Step 5: Testing & Quality Assurance

Each knife gate valve undergoes pressure testing, sealing testing, operation testing, and appearance inspection. Quality control checks confirm that the valve meets relevant standards and customer specifications before delivery.

Knife Gate Valve

Step 6: Painting and Finishing

After final approval, the valve surface is cleaned, painted, and marked. Nameplate, labels, and protective packaging are completed to make the product ready for shipment.

Knife Gate Valve

Applications

Knife gate valves are primarily used in piping systems for fluid shutoff, basic flow regulation, backflow prevention, pressure control, and the discharge of waste liquids and gases. Their most notable feature is their rapid and reliable shutoff capability, which is why they are often employed as emergency shut-off and safety protection devices. Additionally, they can provide a degree of flow and pressure control by adjusting the opening, and their excellent sealing performance prevents backflow of the medium, making them widely applicable in industrial production and equipment maintenance.

These valves are widely used in:

Oil and Gas

Chemical Processing

Power Plants

Water Treatment

Metallurgy and Mining

Agriculture and Irrigation

Factory Environment

Factory Production Line

Material Storage

Quality Control

Assembly Workshop

Quality Control

Assembly Workshop

Why Choose Us

Superior Quality

Our valves are manufactured using premium materials and undergo rigorous quality testing to ensure reliable performance in demanding industrial applications.

Advanced Technology

Equipped with state-of-the-art CNC machining centers and precision manufacturing equipment, we deliver valves with exceptional accuracy and consistency.

Competitive Pricing

Through optimized manufacturing processes and bulk material procurement, we offer high-quality valves at competitive prices without compromising on quality.

Expert Support

Our experienced technical team provides comprehensive support from product selection to after-sales service, ensuring optimal valve performance for your specific application.

Request a Quote

1.Wafer Knife Gate Valve

Technique Standard

Form of Main Parts Materials

Pneumatic Knife Gate Valve Standard Specification

Electric Knife Gate Valve Standard Specification

Main Outline and Connecting Flange Size

2.Through Type Knife Gate Valve

Main Outline and Connecting Flange Size

3.Pneumatic Ceramic Knife Gate Valve

Technical Specification

Main Component Materials

Main Outline and Connecting Size

3.Bonnetless Type Knife Gate Valve

Chief Features

Product Specification

Main Part Material

Main Dimension

4.Bonneted Knife Gate Valve

Main Dimension

5.WPZ Knife Gate Valve

Main Dimension

6.Eccentric Non-rising Stem Knife Gate Valve

Main Dimension

7.SCZ Through-Conduit Knife Gate Valve

Main Dimension

8.Ceramic-lined Knife Gate Valve

Chief Features

Main Dimension

9.Fully Polyurethane-lined Knife Gate Valve

Main Dimension

10.Cast Iron Knife Gate Valve

Main Dimension

Manufacturing Process

Applications

Factory Environment

Why Choose Us

Related Products

High Pressure Gate Valve

Flanged Gate Valve

Jacketed Gate Valve

Bellows Gate Valve