What is Diefei Valves?

Diefei Valves is the industrial valve brand of Hebei Diefei Valve Co., Ltd. Established in 1986, the company manufactures and exports medium and low-pressure valves.

What valve products does Diefei Valves supply?

Diefei Valves manufactures butterfly valves, gate valves, knife gate valves, check valves, air-release valves, strainers, and rubber expansion joints.

What types of butterfly valves are manufactured by Diefei Valves?

Product configurations include aluminum alloy butterfly valves, electric butterfly valves, flange type butterfly valves, high-performance butterfly valves, rubber-coated disc butterfly valves, double eccentric butterfly valves, and WECO type butterfly valves.

What is the size range of Diefei aluminum alloy butterfly valves?

The size range for Diefei aluminum alloy butterfly valves is DN25 to DN300.

What is the size range of Diefei electric butterfly valves?

The size range for Diefei electric butterfly valves is DN25 to DN1200.

What is the size range of Diefei flange type butterfly valves?

The size range for Diefei flange type butterfly valves is DN100 to DN1800.

What is the operating temperature range for Diefei flange type butterfly valves?

The operating temperature range for Diefei flange type butterfly valves is -40°C to +160°C.

What pressure classes are supported by Diefei butterfly valves?

Diefei flange type butterfly valves support PN10 and PN16. Aluminum alloy butterfly valves support PN10, PN16, Class 125, 10K, and 16K pressure ratings.

What materials are used in Diefei butterfly valve construction?

Body materials include aluminum alloy, cast iron, ductile iron, and cast steel. Disc materials include nickel-plated ductile iron, SS304, SS316, SS316L, CF3M, SS2205, SS2507, and aluminum bronze. Stem materials include SS416, SS304, SS316, SS431, 17-4PH, and Monel K500. Seat materials include EPDM, NBR, PTFE, Viton, Hypalon, neoprene, and natural rubber.

What actuation options are available for Diefei butterfly valves?

Actuation options include hand lever, worm gear, industrial gearbox, electric actuator, and pneumatic actuator.

What control capabilities do Diefei electric butterfly valves offer?

Diefei electric butterfly valves utilize electric actuators for remote and automatic pipeline shutoff and flow regulation, integrating directly into automated process control systems.

What industrial applications use Diefei valve products?

Diefei valves are used in water supply, drainage, HVAC, municipal water treatment, drinking water systems, chemical processing, power plants, gas pipelines, ballast and bilge systems, desalination plants, drilling rigs, dry-powder handling, mining, paper manufacturing, and wastewater processing.

What is the function and size range of the Centerline 800 Series check valve?

The Centerline 800 Series check valve provides rapid closure to prevent water hammer. Size availability ranges from DN50 to DN600 (2 inches to 24 inches).

What are the pressure ratings for Diefei knife gate valves?

Diefei knife gate valves are rated for working pressures of 100 to 200 psi.

What quality testing procedures are conducted by Diefei Valves?

Diefei Valves conducts 100% pressure testing on all units before factory dispatch, complying with inspection standards API 598, ISO 5208, EN 12266, and EN 12266-1.

Which manufacturing standards do Diefei butterfly valves comply with?

Design standards include EN 593, API 609, MSS SP-67, MSS SP-68, BS 5155, and ANSI B16.34.

Which connection flange standards do Diefei valves support?

Connection flanges conform to ISO 7005, ISO 7005-2, ISO 2531, BS EN 1092, EN 1092-2, ANSI/ASME B16.1, ANSI/ASME B16.5, ANSI B16.47 Series A, DIN 2501, JIS B 2210, JIS B 2220, AS 2129 (Table D/E), MSS SP-44, AWWA C207, and GB/T 9113.

Which face-to-face standards apply to Diefei valves?

Face-to-face dimensions comply with API 609, EN 558, EN 558-1 Series 14, EN 558-20 Series, ISO 5752, DIN 3202, MSS SP-67, and MSS SP-68. Top mounting flanges conform to ISO 5211.

What international certifications has Diefei Valves earned?

Diefei Valves holds ISO 9001, ISO 14001, ISO 45001, Special Equipment Manufacturing Licenses, EU CE certification, NSF/ANSI 61/372 certification for drinking water series, and DNV Approval of Manufacturer certification.

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Butterfly Valve

Centerline Butterfly Valve

Wafer Type Butterfly Valve

High Performance Butterfly Valve

PTFE Lined Butterfly Valve

Grooved Butterfly Valve

Double Eccentric Butterfly Valve

WECO Type Butterfly Valve

Check Valve

Double Door Check Valve

Double Door Check Valve PN16

Double Door Check Valve PN25

Single Door Check Valve

Single Door Check Valve PN16

Single Door Check Valve PN25

800 Series Check Valve

Ball Check Valve

Gate Valve

Resilient Seated Gate Valve

Metal Seated Gate Valve

Air Release Valve

Double Orifice Air Release Valve

Single Orifice Air Release Valve

Rubber Expansion Joint

Y- Strainer

Y-Strainer

Simplex Basket Strainer

Knife Gate Vave

Double Door Check Valve PN16

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Official Service & Warranty Terms

0.221MB

Butterfly valve

1.135MB

Lug Butterfly valve

1.469MB

Wafer Butterfly valve

1.289MB

DFV Lining butterfly valve-B design

1.402MB

DFV Lining butterfly valve-A design

3.641MB

DIEFEI catalouge

5.241MB

ANSI Butterfly valve catalogue

15.26MB

Diefei Valves,30-year OEM factory, with an annual production capacity of 150,000 units,30 years of foreign trade experience,our customers covering North America, Europe, and other regions.

Home: OEM/ODM Service; Our services; Official service & warranty terms; Data center liquid cooling solutions; Water treatment valve solutions

All Collections: Centerline Butterfly Valve; WECO Type Butterfly Valve; Double Eccentric Butterfly Valve; Check Valve; Gate Valve; Rubber Expansion Joint; Y- Strainer; Air Release Valve; Knife Gate Valve

Contact Us: NO.502 Jinglong Street, Ningjin County, Hebei P.R. China; diefeivalve@gmail.com; +86 13930965861

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