What types of valves does KR Valve manufacture?

KR Valve manufactures more than 500 valve products, including wafer, lug, concentric and double eccentric butterfly valves, resilient seat, metal seat and knife gate valves, dual disc, swing, lift and ball type check valves, ball valves, hydraulic water control valves such as 200X pressure reducing valves and 100X remote float valves, and Y type strainers.

Which international standards do KR valves follow?

Our range covers common international standards such as DIN F5 face-to-face gate valves, BS5163 resilient seat gate valves, BS5153 dual disc check valves, ANSI flanged strainers and PN16 pressure rated water control valves. Non-standard designs can be engineered to your drawings.

Do you offer OEM valve manufacturing?

Yes. In addition to our own KR brand, we provide OEM services, including customer branding, specified body and seat materials, actuation options and project-specific packaging.

Should I choose a wafer or a lug butterfly valve?

Wafer butterfly valves are lighter and more economical and are clamped between two flanges, making them ideal for standard water and HVAC lines. Lug butterfly valves have threaded lugs that allow dead-end service and removal of downstream piping without draining the whole line, which suits maintenance-critical systems.

How is valve quality controlled before shipment?

Every process is inspected from raw material to finished product, and 100% of finished valves are inspected before dispatch. Production plans and lead times are defined upfront through full-chain supply control.

Wholesale Dual Plate Wafer Lug Check Valve 4 Inch Supplier, Manufacturers

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Wholesale Dual Plate Wafer Lug Check Valve 4 Inch Supplier, Manufacturers

Type: Wafer type

Series: H71X-10/16

Size: DN40-DN700/2”-28”

Pressure rating: PN6/PN10/PN16/PN25

Design standard: BS5153

Service: OEM&ODM

As a specialized anti-backflow component for piping systems, the dual disc spring-loaded wafer check valve operates without external actuation; it opens and closes automatically driven by the kinetic energy of the internal medium flow.

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Product Description

Product Specifications

Valve Type

Wafer check valve

Structure

Double disc

Standard

BS5153

Workmanship

Investment casting

Sealing Direction

Single-directional

Sealing Grade

Zero leakage

Temperature

-20°C < T < 120°C

Operation

Self-starting

Characteristics

This valve adopts a wafer-type mounting design, which allows it to be directly sandwiched between a pair of pipeline flanges without requiring additional extended installation space. In contrast to flange-connected check valves, this configuration substantially reduces the spatial footprint of the entire piping system, rendering it particularly suitable for narrow or constrained installation environments.

Advantages

1. Easy Installation

Adopting a clip-on installation method (chip design), it can be easily installed between two pipeline flanges, saving space, reducing the overall weight of the system, and facilitating installation in narrow spaces.

2. Good Fluid Performance

The valve disc adopts a lightweight design and is equipped with low friction bearings, with low opening pressure, low fluid resistance, and smooth flow channels, which can reduce the energy consumption of power equipment such as pumps and compressors.

3. Excellent Sealing Performance

The double valve disc is precision machined, with a smooth sealing surface, and forms a double sealing barrier with an elastic valve seat. It can quickly close when the medium flows back, achieving excellent zero-leakage sealing performance.

Packing

Standard export wooden case packaging

Application Scenarios

This valve finds extensive use in pipeline networks for industries ranging from water supply, sewage disposal and fire safety systems to petroleum refining, chemical manufacturing, power engineering and metallurgical operations. It demonstrates particularly strong compatibility with piping layouts where installation space is restricted.

Material

Body		Disc		Stem	Rubber gasket			Spring
Name	Code	Name	Code	Name	Name	Code	Working temp ℃	Name
Cast Iron Ductile Iron Carbon steel Stainless steel	Z Q C P	Plated ductile Iron Aluminum bronze ZG1Cr13Ni9Ti Stainless steel CF8M Stainless steel	1 2 5 7	Stainless steel	EPDM Neoprene NBR Neoprene	X3 X4 X5 X7	-46~+121 Short time -50~+150 -29~+99 Short time -35~+113 -23~+82 Short time -23~+93 -23~+150	Stainless steel

Dimension

DN		D	D1	D2	L	R	t
mm	inch	D	D1	D2	L	R	t
50	2"	107	65	43.3	43	28.2	19
65	2.5"	127	80	60.2	46	36.1	20
80	3"	142	94	66.4	64	43.4	28
100	4"	162	117	90.8	64	52.8	27
125	5"	192	145	116.9	70	65.7	30
150	6"	218	170	144.6	76	78.6	31
200	8"	273	224	198.2	89	104.4	33
250	10"	328	265	233.7	114	127	50
300	12"	378	310	283.9	114	148.3	43
350	14"	438	360	332.9	127	172.4	45
400	16"	489	410	381.0	140	197.4	52
450	18"	539/555	450	419.9	152	217.8	58
500	20"	594	505	467.8	152	241	58
600	24"	690	624	572.6	178	295.4	73
700	28"	800	720	680	229	354	98

Frequently Asked Questions (FAQ)

Q1: What is the main structural feature of this wafer check valve?

This valve features a double-disc wafer configuration manufactured via investment casting. Its compact wafer design allows it to fit directly between pipeline flanges, drastically saving installation space compared to traditional flanged valves.

Q2: What temperature range can this valve handle?

The overall standard valve temperature range is -20°C < T < 120°C. Specific rubber gasket options allow operation from -50°C up to +150°C depending on the chosen material (such as EPDM, NBR, or Neoprene).

Q3: What standard does this double disc check valve comply with?

This valve is manufactured according to the BS5153 standard, ensuring reliable structural integrity, flow performance, and sealing standards for industrial piping systems.

Q4: How does the valve achieve zero leakage sealing performance?

The valve disc is precision-machined with a smooth sealing surface, forming a double-sealing barrier against the elastic valve seat. When medium backflow occurs, the spring-assisted discs close rapidly to guarantee single-directional zero leakage.

Q5: Which industrial applications are suitable for this valve?

It is widely used in water supply, sewage disposal, fire safety, petroleum refining, chemical manufacturing, power engineering, and metallurgical operations, especially where installation space is restricted.

Q6: What body and disc materials are available?

Body material options include Cast Iron, Ductile Iron, Carbon Steel, and Stainless Steel. Disc materials include Plated Ductile Iron, Aluminum Bronze, and Stainless Steel (ZG1Cr13Ni9Ti / CF8M).