American Standard Gate Valve_Meisonilan Valves (Suzhou) Co., Ltd.

Structural characteristics

① The product design and manufacturing meet the requirements of advanced foreign standards, featuring reliable sealing and excellent performance.

② The structural design is compact and reasonable with an elegant appearance.

③ It adopts a wedge-type elastic gate structure, and rolling bearings are installed for medium and large calibers, ensuring easy opening and closing.

④ A complete range of valve body materials is available. Packings and gaskets are reasonably selected according to actual working conditions or user requirements, making it suitable for various pressure, temperature, and medium conditions.

⑤ It adopts multiple domestic and foreign piping flange standards and flange sealing surface types to meet various engineering needs and user requirements.

Pressure test

Nominal pressure	Strength test		Water seal test		Airtight seal test
Nominal pressure	MPa	Lbf/in　2	MPa	Lbf/in　2	MPa	Lbf/in　2
150	3.1	450	2.2	315	0.5～0.7	60～100
300	7.8	1125	5.6	815
600	15.3	2225	11.2	1630
900	23.1	3350	16.8	2440
1500	38.4	5575	28.1	4080
2500	64.6	9367	47.4	6873

Main component materials and performance

Housing	ASTM　216WCB								ASTM A351　CF8
Ram	WCB			CF8		CF8M		Monel	ASTM A351　CF8
Valve stem	F6a			F304		F316		Monel	F304
Gate sealing surface	13Cr	13Cr	STL	304	STL	316	STL	Monel	304	304	STL
Seat seals face	13Cr	STL	STL	304	STL	316	STL	Monel	304	STL	STL
Housing	ASTM A351 CF3					ADTM A351 CF8M			ASTM A351 CF8
Ram	ASTM A351 CF3					ADTM A351 CF8M			ASTM A351 CF8
Valve stem	F304L					F316			F316L
Gate sealing surface	304L			304L	STL	316	316	STL	316L	316L	STL
Seat Seals Face	304L			STL	STL	316	STL	STL	316L	STL	STL

Z41W-150LB American standard gate valve - external parameters and connection dimensions

Model	Specifications	Size (mm)
Model	inch	DN	L	D	D1	D2	b	z-Φd	H	D0
Z41W-150Lb	1/2"	15	108	89	60.5	35	12	4-Φ15	155	120
	3/4"	20	117	98	70	43	12	4-Φ15	160	120
	1"	25	127	108	79.5	51	12	4-Φ15	200	140
	11/4"	32	140	117	89	64	13	4-Φ15	245	160
	11/2"	40	165	127	98.5	73	15	4-Φ15	285	180
	2"	50	178	152	120.5	92	16	4-Φ19	315	200
	21/2"	65	190	178	139.5	105	18	4-Φ19	375	220
	3"	80	203	190	152.5	127	19	4-Φ19	400	240
	4"	100	229	229	190.5	157	24	8-Φ19	460	280
	5"	125	254	254	216	186	24	8-Φ22	540	300
	6"	150	267	279	241.5	216	26	8-Φ22	620	320
	8"	200	292	343	298.5	270	29	8-Φ22	800	400
	10"	250	330	406	362	324	31	12-Φ25	850	450
	12"	300	356	483	432	381	32	12-Φ25	1000	500
	14"	350	381	533	476	413	35	12-Φ29	1300	600
	16"	400	406	597	540	470	37	16-Φ29	1400	600
	18"	450	432	635	578	533	40	16-Φ32	1600	650
	20"	500	457	698	635	584	43	20-Φ32	1850	650
	24"	600	508	813	749.5	692	48	20-Φ35	2200	700

Z41W-300LB American standard gate valve - external parameters and connection dimensions

Model	Specifications	Size (mm)
Model	inch	DN	L	D	D1	D2	b	z-Φd	H	D0
Z41W-300Lb	1/2"	15	140	95	66.5	35	15	4-Φ15	155	120
	3/4"	20	152	117	82.5	43	16	4-Φ19	160	120
	1"	25	165	124	89	51	18	4-Φ19	200	140
	11/4"	32	178	133	98.5	64	19	4-Φ19	250	160
	11/2"	40	190	156	114.5	73	21	4-Φ22	290	180
	2"	50	216	165	127	92	22	8-Φ19	330	220
	21/2"	65	241	190	149	105	25	8-Φ22	385	250
	3"	80	283	210	168.5	127	29	8-Φ22	410	280
	4"	100	305	254	200	157	32	8-Φ22	480	300
	5"	125	381	279	235	186	35	8-Φ22	630	350
	6"	150	403	318	270	216	37	12-Φ22	690	350
	8"	200	419	381	330	270	41	12-Φ25	830	450
	10"	250	457	445	387.5	324	48	16-Φ29	1003	500
	12"	300	502	521	451	381	51	16-Φ32	1137	600
	14"	350	762	584	514.5	413	54	20-Φ32	1489	750
	16"	400	838	648	571.5	470	57	20-Φ35	1581	800
	18"	450	914	711	628.5	533	60	24-Φ35	2017	850
	20"	500	991	775	686	584	64	24-Φ35	2228	900
	24"	600	1143	914	813	692	70	24-Φ41	2650	950

Z41W-600LB American standard gate valve - external parameters and connection dimensions

Z41W-600Lb	1/2"	15	165	95	66.5	35	15	4-Φ15	155	120
	3/4"	20	190	118	82.5	43	16	4-Φ19	160	120
	1"	25	216	124	89	51	18	4-Φ19	200	140
	11/4"	32	229	133	98.5	64	21	4-Φ19	250	160
	11/2"	40	241	156	114.5	73	23	4-Φ22	290	180
	2"	50	292	165	127	92	26	8-Φ19	350	250
	21/2"	65	330	190	149	105	29	8-Φ22	430	250
	3"	80	356	210	168	127	32	8-Φ22	470	300
	4"	100	432	273	216	157	38	8-Φ25	570	350
	5"	125	508	330	266.5	186	45	8-Φ29	700	400
	6"	150	559	356	292	216	48	12-Φ29	750	500
	8"	200	660	419	349	270	56	12-Φ32	830	600
	10"	250	787	508	432	324	64	16-Φ35	1210	650
	12"	300	838	559	489	381	67	20-Φ35	1350	700
	14"	350	889	603	527	413	70	20-Φ38	1600	750
	16"	400	991	686	603	470	77	20-Φ41	1800	800
	18"	450	1092	743	654	533	83	20-Φ44	2110	900
	20"	500	1194	813	724	584	89	24-Φ44	2350	950
	24"	600	1397	940	838	692	102	24-Φ52	2900	1000

Valve Installation:
(1) Before installation, check that the product model, tag number, and specifications match the requirements. Inspect the entire valve for missing or loose parts.
(2) Prior to installation, clean the pipeline. Ensure there is sufficient straight pipe section at the valve inlet and install a filter. When connecting the valve body to the pipeline flanges, ensure coaxiality.
(3) Thoroughly clean the pipeline before installing the valve.
(4) The installation site should ensure the safety of personnel and equipment, facilitating operation, disassembly, and maintenance.
(5) The valve should be installed vertically upright on horizontal pipelines. If necessary, it can be installed at an angle, but horizontal installation should be avoided. For occasions with heavy valve weight or vibration, use a support frame.
(6) The medium flow direction must align with the arrow on the valve body. The air supply should be dry and oil-free. The valve should be used in environments with temperatures ranging from -20℃ to 55℃.

Valve Maintenance:
(1) Cleaning the Valve: For general media, cleaning with water is sufficient. For media harmful to health, first understand their properties and then select an appropriate cleaning method.
(2) Disassembly: Remove rust from exposed rusted parts first. Before derusting, protect the machined surfaces of precision parts such as the valve seat, valve plug, valve stem, and push rod. Use special tools when disassembling the valve seat.
(3) Valve Seat: Minor rust or wear on the sealing surface can be repaired by machining. If damage is severe, replace the seat. However, both repaired and replaced hard sealing surfaces must be lapped.
(4) Valve Stem: If the surface is damaged, it must be replaced.
(5) Damage to Push Rod, Guide, and Sealing Surfaces: Reverse-acting actuators must be replaced; direct-acting actuators can be reused after proper repair.
(6) Compression Spring: If there are cracks or other defects affecting strength, replace it immediately.
(7) Wear Parts: Packing, gaskets, and O-rings must be replaced entirely during each maintenance. Check the valve plug and diaphragm for cracks, aging, or corrosion that may cause future failures. Decide whether to replace them based on inspection results, but the diaphragm service life should not exceed 2-3 years.
(8) When reassembling the valve, ensure alignment. Tighten bolts diagonally and lubricate sliding parts. After reassembly, debug the valve according to the factory test items and methods. During this period, accurately adjust the packing compression force and the valve plug closing position.

When placing an order, please fill in the Specification Sheet or specify the following information:

If the model has not been selected before ordering, please provide us with the operating parameters:
(1) Nominal diameter DN (mm);
(2) Nominal pressure (MPa or bar);
(3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
(4) Pressure before and after the valve (pressure differential);
(5) Requirements for flow characteristics;
(6) Materials of valve body and valve core;
(7) Connection type;
(8) Driving method (provide air supply pressure, driving voltage);
(9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
(10) On-site working conditions.
If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.