American Standard Flanged Swing Check Valve

The flanged swing check valve is the most commonly used one-way valve for large-diameter, medium-to-low pressure pipelines. It opens and closes automatically in response to the pressure of the medium, permitting flow in only one direction and preventing backflow. Operating Principle: Forward Flow—The pressure of the medium pushes open the disc-shaped valve flap; the flap pivots around a hinge pin to open, allowing for unobstructed flow. Reverse Flow—The combined force of the medium's back pressure and the weight of the valve flap causes the flap to swing back onto the valve seat, creating a tight seal and preventing backflow. The face-to-face dimensions and flange specifications adhere to American standards.

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Specification
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Design Features:
Flanged ends:
ASME B16.5, ANSI B16.5
Test & inspection:
API598

Main parts and materials

ITEM

PART

MAIN MATERIAL

Body

CF8 CF3 CF8M CF3M WCB

Bonnet

CF8 CF3 CF8M CF3M WCB

Disc

CF8 CF3 CF8M CF3M WCB

Gasket

PTFE Spiral Wound Gasket

Bolt

B8 B7

Nut

A194-82H

Main dimensions

SIZE	Class 150LB								Class 300LB
	L	D		D1	D2	b	f	n-Φd	L	D		D1	D2	b	f	n-Φd
1/2"	108	90	88.9	60.3	34.9	8	2	4-Φ16	152	95	95.3	66.7	34.9	12.7	2	4-Φ16
3/4"	117	100	98.6	69.9	42.9	8.9	2	4-Φ16	178	115	117.3	82.6	42.9	14.3	2	4-Φ19
1"	127	110	108	79.4	50.8	9.6	2	4-Φ16	216	125	123.9	88.9	50.8	15.9	2	4-Φ19
1-1/4"	140	115	117.3	88.9	63.5	11.2	2	4-Φ16	229	135	133.3	98.4	63.5	17.5	2	4-Φ19
1-1/2"	165	125	127	98.4	73	12.7	2	4-Φ16	241	155	155.4	114.3	73	19.1	2	4-Φ22
2"	203	150	152.4	120.7	92.1	14.3	2	4-Φ19	267	165	165.1	127	92.1	20.7	2	8-Φ19
2-1/2"	216	180	177.8	139.7	104.8	15.9	2	4-Φ19	292	190	190.5	149.2	104.8	23.9	2	8-Φ22
3"	241	190	190.5	152.4	127	17.5	2	4-Φ19	318	210	209.5	168.3	127	27	2	8-Φ22
4"	292	230	228.6	190.5	157.2	22.3	2	8-Φ19	356	255	254	200	157.2	30.2	2	8-Φ22
5"	330	255	254	215.9	185.7	22.3	2	8-Φ22	400	280	279.4	235	185.7	33.4	2	8-Φ22
6"	356	280	279.4	241.3	215.9	23.9	2	8-Φ22	444	320	317.5	269.9	215.9	35	2	12-Φ22
8"	495	345	342.9	298.5	269.9	27	2	8-Φ22	533	380	381	330.2	269.9	39.7	2	12-Φ25

10"	622	405	406.4	362	323.8	28.6	2	12-Φ25	622	445	444.5	387.4	323.8	46.1	2	16-Φ29
12"	698	485	482.6	431.8	381	30.2	2	12-Φ25	711	520	520.7	450.8	381	49.3	2	16-Φ32
14"	787	535	533.4	476.3	412.8	33.4	2	12-Φ29	838	585	584.2	514.4	412.8	52.4	2	20-Φ32

16"	864	595	596.9	539.8	469.9	35	2	16-Φ29	864	650	647.7	571.5	469.9	55.6	2	20-Φ35
18"	978	635	635	577.9	533.4	38.1	2	16-Φ32	978	710	711	628.6	533.4	58.8	2	24-Φ35
20"	978	700	698.5	635	584.2	41.3	2	20-Φ32	1016	775	774.7	685.8	584.2	62	2	24-Φ35

24"	1295	815	812.8	749.3	692.2	46.1	2	20-Φ35	1346	915	914.4	812.8	692.2	68.3	2	24-Φ41

The dimensions above are for reference only.

Zhongchi Valve Group Co., Ltd. was established in April 2008. The company is a valve manufacturing enterprise that integrates design, development, production, and sales. It is located in the Binhai Industrial Park of Wenzhou Economic and Technological Development Zone.
The company adheres to the corporate tenet of "quality-oriented, innovation-driven, management-efficient, and service-focused", and upholds the business philosophy of "service-oriented and integrity-abiding". We provide customers with reliable quality assurance through advanced technology and scientific management, offers services with a complete range of products and a short delivery time, and strives to achieve the corporate goal of "building an excellent enterprise and creating a brand in the industry". The company has successively obtained ISO9001 international quality management system certification, ISO14001 environmental management system certification, ISO45001 occupational health and safety management system certification, special equipment manufacturing production license TS certification, CE certification, EAC certification, API607 fire protection certification, and has been recognized as a small and medium-sized technology enterprise in Zhejiang Province and a national high-tech enterprise.
The company's main products include ball valves, gate valves, globe valves, check valves, filters, butterfly valves, etc. These products are widely used in various industries such as petroleum, chemical, natural gas, light industry, electric power, pharmaceuticals, dyes, metallurgy, fiber, leather making, textile, food, military, construction engineering, refrigeration, water supply, and more.