Efficient Check Valve for Reliable Heavy-Duty Industrial Use

• Media: Water
• Temperature: Ordinary Temperature
• Material: Stainless Steel
• Model NO.: H14W-16P
• Connection Form: Thread
• Structure: Swing
• Pressure: Ordinary Temperature
• Sealing Form: Bellows Globe Valve
• Flow Direction: Unidirection
• Application: Industrial Usage, Water Industrial Usage
• Transport Package: Carton
• Specification: 21*21*13
• Trademark: XH
• Origin: Zhejiang
• HS Code: 8481409000
• Production Capacity: 500000/Years

Product Description

Intro to products

Our Stainless Steel Swing Check Valve (NPS 1/2"–2", DN15–DN50) is a precision-engineered device designed for industrial fluid systems prioritizing reliability, corrosion resistance, and consistent performance. Made from premium CF8/CF8M stainless steel and tested to GB/T 13927 standards, this valve ensures automatic, leak-tight one-way flow control across various media — water, oil, steam, chemicals, and food-grade liquids.

Whether in pumping stations, HVAC systems, chemical processing lines, or water networks, this valve safeguards system integrity by stopping reverse flow that could harm pumps, contaminate fluids, or disrupt operations.

Typical Applications
Water supply & treatment: Municipal networks, booster pump stations, fire systems
HVAC & plumbing: Hot/cold water circulation, cooling tower circuits, boiler feed lines
Chemical & petrochemical: Corrosive media, dosing, low-pressure lines
Food & beverage: Hygienic transfer, CIP/SIP-compatible setups
General industrial: Compressed air, light steam, condensate return

NPS	L	D	H
1/2"	65	15	44
3/4"	80	20	53
1"	90	25	58
1-1/4"	105	32	62
1-1/2"	120	40	73
2"	141	50	78

Company Profile

Core Product Range
We produce stainless (SS304, SS316, SS316L) and carbon steel fluid control components, including:

Ball Valves: 1PC, 2PC, 3PC, Flanged, Three-way, and Pneumatic/Electric Actuated.
Industrial Valves: Gate, Globe, Check (Swing and Horizontal), and Y-Strainers.
Pipe Fittings: Precision elbows, tees, unions, couplings, threaded/socket-weld.
Quality & Standards
Quality is key. Our products meet ANSI/ASME, DIN, JIS, and GB standards. We use advanced CNC machining and rigorous testing (pressure and spectral analysis) to ensure durability, precision, and safety.

Industry Applications
Our solutions serve clients in diverse sectors, including:

Water Treatment & Desalination
Oil & Gas Processing
Chemical & Petrochemical Industries
Food, Beverage, and Pharmaceuticals
HVAC and General Industrial Pipelines
Why Partner with Zhejiang Xinhong?
Technical Expertise: Our team provides tech support and custom solutions (OEM/ODM) for specific projects.
Export Excellence: With trade experience, we offer seamless logistics and documentation support globally.
Competitive Advantage: Located in China's valve hub, we deliver premium quality products with cost-effective pricing and reliable lead times.
At Zhejiang Xinhong Valve & Pipe Fitting Co., Ltd., we are committed to "Precision in Every Turn." We aim to establish long-term, mutually beneficial partnerships with distributors and industrial partners globally.

Packaging & Shipping

Certifications

FAQ

1. What is the difference between PN and Class pressure ratings?
Answer: PN, used in European standards (e.g., DIN, GB), measures pressure in bar (e.g., PN16 = 1.6 MPa). Class, used in U.S. standards (ANSI/ASME), such as Class 150. They differ due to reference temperatures and material strength.
2. How to choose between Stainless Steel 304 and 316?
Answer: SS304 is versatile stainless steel for water, oil, gas. SS316 contains Molybdenum (Mo), offering superior resistance to chloride corrosion, ideal for marine, chemical, or corrosive environments.
3. What are "Soft Seats" and "Metal Seats"?
Answer: Soft Seats use elastomers or plastics (PTFE/Teflon), providing excellent sealing (Zero Leakage) but are limited to <200°C. Metal Seats offer metal-to-metal contact, high temperature/pressure resistance, and durability, though with higher allowable leakage.
4. Can NPT and G threads be used interchangeably?
Answer: No, NPT is an American Taper Pipe Thread with a 60° angle. G is a parallel pipe thread (British BSPP) with a 55° angle. Connecting them causes seal failure or thread damage.
5. What is the difference between a Swing Check Valve and a Lift Check Valve?
Answer: A Swing Check Valve has a hinged disc, offering lower flow resistance, ideal for large-diameter pipelines. A Lift Check Valve's disc moves vertically, providing better sealing but higher resistance, used for small-diameter pipes.

6. Why do ball valves get damaged easily in a half-open position?
Answer: Ball valves are meant for full-on/off use. Half-open, high-velocity flow damages exposed parts, causing seat erosion or "wire drawing". For throttling, use globe or control valves.
7. What are Full Bore and Reduced Bore ball valves?
Answer: Full Bore ball valves have a port equal to the pipe's ID, allowing minimal flow resistance and "pigging". Reduced Bore valves have smaller ports, cost-effective for systems where pressure drop isn't crucial.

8. What are the common causes of internal leakage in valves?
Answer: The main causes include:
(1)Impurities (like welding slag or sand) on the sealing surface;
Erosion or wear of sealing faces;
Valve not being fully closed;
Incorrect selection (e.g., pressure/material limits exceeded).
9. How to choose between Double Acting and Single Acting (Spring Return) pneumatic actuators?
Answer: Double Acting actuators need air pressure to open/close and are cost-effective. Single Acting (Spring Return) actuators use springs for automatic valve reset to "fail-safe" (Open/Closed) on air pressure loss, ideal for safety-critical applications.
10. What are common certifications for valve exports?
Answer: Certifications include ISO 9001 (Quality Management), CE (EU market), WRAS (UK water safety), and MTC (Material Test Certificate) for traceability.