Industrial Valves Manufacturer for EPC, Power Plant & Piping Projects

✅ Professional Industrial Valves Manufacturer in China
We are a professional manufacturer of industrial valves for EPC projects, power plants, petrochemical, oil & gas, water treatment, shipbuilding, and industrial piping systems. Industrial valves are mechanical devices that regulate, direct, or control the flow of liquids, gases, slurries, or steam by opening, closing, or partially obstructing various passageways. Our product portfolio covers the five main valve types — gate valves, globe valves, ball valves, butterfly valves, and check valves — manufactured in carbon steel (ASTM A216 WCB), stainless steel (ASTM A351 CF8M / A182 F316), and alloy steel. All products comply with ASME B16.34 (pressure-temperature ratings), API 600 (steel gate valves), API 6D (pipeline valves), API 602 (compact steel valves), and API 598 (inspection and testing), with pressure classes 150 through 2500 and sizes NPS 1/2 to NPS 48.

📋 Product Overview & Key Features

Industrial valves are the flow control elements of every piping system. Valve selection is driven by three primary factors: function (isolation, regulation, or non-return), service conditions (pressure, temperature, and fluid), and standards compliance. ASME B16.34 establishes the pressure-temperature ratings that underpin virtually every valve product standard[reference:0]. Key features of our valve range include:

📦 Valve Types, Functions & Applications

* Five main industrial valve types are covered: gate, globe, butterfly, ball, and check valves[reference:6]. Selection is governed by whether the service requires isolation (gate/ball), regulation (globe/butterfly), or non-return protection (check).

📋 Technical Specification

* Custom materials, trim combinations, and end connections are available upon request for EPC project tenders.

📊 Pressure-Temperature Rating Reference (ASME B16.34, Group 1.1 Carbon Steel)

* Ratings apply to Material Group 1.1 (carbon steel, e.g., ASTM A216 WCB / A105)[reference:14]. Allowable pressure decreases as temperature increases. Full P-T tables for all material groups and classes are available upon request.

📊 Industrial Valve Selection Guide

❓ Frequently Asked Questions (FAQ)

Q1: What are industrial valves?
A: Industrial valves are mechanical devices used to regulate, direct, or control the flow of liquids, gases, slurries, or steam in a piping system by opening, closing, or partially obstructing the passageway. They are essential for isolation, regulation, non-return protection, and safety in power, petrochemical, water, and process industries.

Q2: What are the five main types of industrial valves?
A: The five main types are gate valves, globe valves, butterfly valves, ball valves, and check valves[reference:19]. Gate and ball valves are primarily for on/off isolation; globe and butterfly valves can regulate flow; check valves prevent reverse flow automatically.

Q3: What is the difference between a gate valve and a globe valve?
A: A gate valve uses a flat disc that moves perpendicular to the flow, providing low pressure drop and full-bore flow — ideal for on/off isolation but not suitable for throttling. A globe valve uses a plug-and-seat arrangement that allows precise flow regulation but creates higher pressure drop; it offers better sealing for throttling service[reference:20].

Q4: What is the difference between a ball valve and a butterfly valve?
A: A ball valve uses a rotating ball with a bore to stop or start flow, offering full-bore flow, low torque, and bi-directional sealing. A butterfly valve uses a rotating disc, providing a compact and lightweight solution that is especially economical in large diameters, though it may not offer full-bore flow[reference:21].

Q5: What standards do your industrial valves comply with?
A: Our valves are designed and tested to ASME B16.34 (pressure-temperature ratings), API 600 (steel gate valves), API 6D (pipeline valves), API 602 (compact steel valves), and API 598 (inspection and testing)[reference:22][reference:23].

Q6: What is ASME B16.34 and why does it matter?
A: ASME B16.34 is the American standard that defines pressure-temperature ratings for flanged, threaded, and welding-end valves made from steel, nickel alloys, and other materials. It specifies the maximum allowable pressure at a given temperature based on pressure class and body material group. Virtually every valve product standard (API 600, API 6D, API 602) references B16.34 for rating compliance[reference:24].

Q7: What pressure classes are available?
A: ASME pressure classes: 150, 300, 400, 600, 900, 1500, and 2500[reference:25]. The class must be selected so that the valve’s pressure rating at the maximum operating temperature is not exceeded.

Q8: What size range do you offer?
A: NPS 1/2 to NPS 48 (DN 15 to DN 1200). Compact forged valves (API 602) are typically available in NPS 1/2 to NPS 2; cast steel valves (API 600) cover larger sizes.

Q9: What body materials are available?
A: Carbon steel: ASTM A216 WCB (cast), A105 (forged). Stainless steel: A351 CF8M (cast 316), A182 F316 (forged 316), A351 CF8 (cast 304). Alloy / low-temp: A217 WC6/WC9 (chrome-moly), A350 LF2 (low-temperature carbon steel)[reference:26].

Q10: What is valve “trim” and how do I select it?
A: Valve trim refers to the wetted internal components — disc, seat, stem, and backseat — that contact the process fluid. Common trim numbers per API 600: Trim 1 (13Cr/13Cr) for general water/oil/gas service; Trim 8 (Stellite/13Cr) for higher wear resistance and temperatures up to ~399°C (750°F); Trim 10 (316/316) for corrosive service; Monel trim for seawater and HF acid[reference:27][reference:28].

Q11: What end connections are available?
A: Flanged per ASME B16.5 (Class 150–2500); butt weld per ASME B16.25; socket weld per ASME B16.11; threaded per ASME B1.20.1 (NPT)[reference:29]. The connection type must match the piping specification and installation method.

Q12: What is the difference between API 600 and API 602?
A: API 600 covers bolted bonnet steel gate valves for petroleum and natural gas industries, typically NPS 2 and larger. API 602 covers compact steel gate, globe, and check valves for sizes NPS 1/2 to NPS 2, often forged construction for high-pressure small-bore service[reference:30][reference:31].

Q13: What is API 6D used for?
A: API 6D is the specification for pipeline valves — gate, plug, ball, check, and butterfly valves used in pipeline transportation systems. It covers design, materials, testing, and documentation for valves that isolate pipeline sections or control flow in oil and gas transmission[reference:32].

Q14: What tests are performed on industrial valves before delivery?
A: Per API 598, we perform shell tests (body integrity under pressure), seat tests (leakage across the seat), and backseat tests where applicable. Additional NDT (RT, UT, PT, MT), PMI, and hardness testing can be specified for critical service[reference:33][reference:34].

Q15: How do I read an ASME B16.34 pressure-temperature table?
A: (1) Identify the body material and its material group (e.g., Group 1.1 for A216 WCB). (2) Determine the maximum operating temperature. (3) Look up the pressure class in the table for that material group. (4) Read the allowable pressure at the design temperature. (5) Verify that the design pressure does not exceed the tabulated value[reference:35].

Q16: Can industrial valves be used in sour service (H₂S)?
A: Yes. NACE MR0175 / ISO 15156 construction is available, with controlled material hardness and suitable trim selection (e.g., 316SS, Monel, or Stellite) for resistance to sulfide stress cracking.

Q17: What is the difference between a swing check and a dual-plate check valve?
A: A swing check valve uses a hinged disc that swings open with forward flow and closes by reverse flow; it is suitable for horizontal or vertical installation and larger sizes. A dual-plate check valve uses two spring-loaded plates and is lighter, more compact, and faster-closing, often used in space-constrained or pulsating service[reference:36].

Q18: What certificates are provided with your industrial valves?
A: Standard: EN 10204 3.1 mill certificates with heat number traceability. Additional services: PMI (Positive Material Identification) , hardness testing, NDT reports, and API 598 test certificates.

Q19: Do you support EPC projects with technical documentation?
A: Yes. We provide datasheets, dimension drawings, pressure-temperature rating tables, material certificates, API 598 test reports, and full traceability documentation for EPC project compliance. Our engineering team can review your valve specifications and recommend the optimal valve type, class, and trim.

Q20: Can you provide custom industrial valve configurations?
A: Yes. We offer custom body materials, trim combinations, pressure classes, end connections, actuator options (manual, gear, pneumatic, electric), and special testing requirements to meet project-specific specifications. Our engineering team works closely with EPC contractors to develop valves that match specific piping classes, service conditions, and standards compliance requirements.

📩 Contact Us for EPC Project Pricing & Technical Support

Send your valve specification, piping class, or project requirements. Our engineering team will reply with a customized BOM, datasheet & test certificates within 24 hours.

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