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.

OEM Stainless Steel Dual Plate Wafer Spring Check Valve Manufacturer, Factories

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OEM Stainless Steel Dual Plate Wafer Spring Check Valve Manufacturer, Factories

Type: Wafer type

Series: H71W-10/16

Size: DN40-DN700/2”-28”

Pressure rating: PN6/PN10/PN16/PN25

Design standard: AWWA C594

Service: OEM&ODM

The stainless steel wafer check valve is an automatic anti-backflow device featuring a stainless steel body and wafer-type mounting design. It achieves automatic opening and closing via the inherent pressure differential of the medium, requires no external actuation, and is widely used in piping systems handling corrosive or hygienic fluids.

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Product Description

Technical Specifications

Valve Type

Wafer check valve

Structure

Double disc

Standard

AWWA C594

Workmanship

Investment casting

Sealing Direction

Single-directional

Sealing Grade

Zero leakage

Temperature

-40°C < T < 800°C

Operation

Self-starting

Characteristics

The clamp check valve is made of stainless steel material, with core advantages concentrated in three dimensions: corrosion resistance, adaptability, and durability, which can significantly improve the reliability of the valve under complex working conditions.

Key Advantages

1. Wide Temperature Adaptability

Stainless steel material has stable mechanical properties in the temperature range of -40 ℃~450 ℃. With different sealing seats (such as fluororubber and metal hard seals), it can adapt to the transportation of low-temperature freezing media and meet the needs of high-temperature steam, hot oil and other working conditions. Compared with cast iron valves, it is less prone to brittle cracking due to sudden temperature changes.

2. Lightweight & Space-Saving Design

Stainless steel has a lower density than cast steel, and the valve body is lighter in weight. Combined with a clamp type compact structure, it further reduces the load-bearing capacity of pipeline flanges. No additional reinforcement brackets are required during installation, making it particularly suitable for pipeline systems with limited space and strict load-bearing requirements.

3. Convenient Maintenance & Reduced Costs

Stainless steel valve body is not prone to scaling and coking, and the inner wall of the flow channel is smooth. Daily cleaning only requires simple flushing; and the anti-corrosion characteristics reduce the rusting and jamming of internal components of the valve, lower the probability of valve disc opening and closing failure, and significantly reduce the frequency and cost of shutdown maintenance.

Material Specifications

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

Dimensions Data

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

Application Scenarios

This valve finds extensive application in pipeline networks spanning multiple industries, including chemical processing, petroleum refining, pharmaceutical manufacturing, food and beverage production, seawater desalination, water treatment engineering and HVAC systems. It demonstrates exceptional suitability for operating conditions where rigorous standards for medium purity and corrosion resistance are mandated, alongside constraints on installation space.

Packaging Details

Standard export wooden case packaging.

Frequently Asked Questions

Q1: What standard and structure does this wafer check valve follow?

This check valve is engineered according to the AWWA C594 standard and features a double disc, self-starting wafer structure constructed with precision investment casting.

Q2: What is the operating temperature range for this valve?

The valve withstands temperature ranges from -40°C up to 800°C overall. Depending on seat selection (e.g., EPDM, NBR, or Neoprene), specific sealing seat operating temps range between -50°C and +150°C.

Q3: What are the primary sealing capabilities of this valve?

It features a single-directional sealing direction designed to deliver a zero-leakage sealing grade under designated working pressures.

Q4: What body and seat materials are available?

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

Q5: Which industries commonly utilize this double disc check valve?

It is extensively applied across chemical processing, petroleum refining, pharmaceutical manufacturing, food & beverage production, seawater desalination, water treatment engineering, and HVAC systems.

Q6: What size range is provided in the standard dimensions table?

Nominal dimensions span from DN50 (2 inch) up to DN700 (28 inch), accommodating small to large-scale industrial pipeline installations.