China Suppliers Factory Thin Type Single Disc Wafer Swing Check Valve DN50-DN900 for Water Supply and HVAC

Size: DN50-DN900

Body: Cast iron / Ductile iron / Carbon steel / Stainless steel

Disc: Plated ductile iron / Aluminum bronze

Stem: Stainless steel

Seat: EPDM/NBR / Silicon

Spring: SS304 / SS316

Description

Our wafer check valve, manufactured in our state-of-the-art China factory, represents the pinnacle of quality in valve technology. Designed for installation between pipe flanges and secured with bolts, this valve is essential for water supply systems, HVAC systems, petrochemical processes, and sewage treatment facilities. Partnering with reliable suppliers ensures that our products, including these wafer check valves, meet rigorous standards for durability and performance. Choose our high-performance solutions to enhance your industrial applications.

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Product Details

A Single Plate Check Valve is a compact, wafer-type non-return valve designed to prevent reverse flow in piping systems. It features a single swing disc that opens automatically under forward flow and closes quickly when the flow stops or reverses, ensuring reliable backflow prevention and system protection.

Working Principle

When the fluid flows in the correct direction, the pressure pushes the disc open, allowing smooth passage through the valve. Once the flow stops or reverses, the disc automatically swings back to the seat, closing the valve and preventing reverse flow without the need for external control.

Key Features

Compact Wafer Design

Single Swing Disc Structure

Automatic Backflow Prevention

Low Pressure Drop

Flexible Installation

Reliable Sealing Performance

Specification

Dimensions

DN (mm)	L		D1	D				Weight (kg)
DN (mm)	PN1.0/1.6 MPa	PN2.5/4.0 MPa	D1	1.0 MPa	1.6 MPa	2.5 MPa	4.0 MPa	Weight (kg)
50	15	19	25	104	104	109	109	1.2
65	15	19	38	125	125	129	129	1.6
80	16	19	46	140	140	144	144	2.2
100	16	19	71.5	160	160	170	170	2.7
125	17	19	95	185	185	196	196	3.8
150	19	29	114	220	220	226	226	5.8
200	26	29	140	270	270	286	293	14
250	29	38	188	330	331	343	355	17.5
300	38	51	216	380	386	403	420	27
350	38	45	263	440	446	460	477	41.5
400	48	55	305	491	495	517	549	60
450	48	60	356	541	558	567	574	74
500	58	70	406	596	620	622	626	116
600	68	78	482	698	732	734	745	178
700	70	80	562	813	804	831	—	—
800	75	95	664	918	912	942	—	—
900	75	95	738	1018	1012	1040	—	—
1000	90	100	846	1124	1126	1155	—	—

Frequently Asked Questions

Q What is a Single Plate Check Valve and how does it work?

A Single Plate Check Valve is a compact, wafer-type non-return valve that uses a single swing disc to allow fluid to pass in one direction only. When forward flow pressure pushes the disc open, fluid passes through freely. When flow stops or reverses, the disc automatically swings back to its seat, sealing the valve and preventing backflow without any external actuation.
Q What pressure ratings are available for this check valve?

The Single Plate Check Valve is available in multiple pressure ratings: PN1.0 MPa, PN1.6 MPa, PN2.5 MPa, and PN4.0 MPa. The corresponding flange outer diameter (D) and face-to-face length (L) vary by pressure class and nominal diameter (DN), as detailed in the dimensions table above.
Q What nominal sizes (DN) are available for the Single Plate Check Valve?

The valve is available in a wide range of nominal diameters from DN50 up to DN1000, covering most industrial and municipal piping system requirements. Larger sizes (DN700–DN1000) are available for PN1.0, PN1.6, and PN2.5 MPa ratings.
Q What are the main advantages of a wafer-type single plate check valve over other check valve types?

The wafer-type single plate check valve offers a significantly more compact and lightweight design compared to swing check valves or dual plate check valves of the same DN. Its slim face-to-face dimension reduces space requirements in the pipeline, and its low pressure drop minimizes energy loss. It requires no external control and provides fast, automatic closure to prevent water hammer.
Q Can the Single Plate Check Valve be installed in any orientation?

Yes. The Single Plate Check Valve features flexible installation compatibility and can be installed in horizontal, vertical (upward flow), or inclined pipelines. Its wafer body design allows it to be clamped between standard flanges, making installation straightforward in most piping configurations.
Q What industries and applications is this check valve suitable for?

Single Plate Check Valves are widely used across water supply and drainage systems, HVAC systems, fire protection pipelines, industrial process piping, pump discharge lines, and chemical or petrochemical plants. Their reliable sealing performance and compact design make them suitable for any application requiring dependable backflow prevention.