Durable 304 Stainless Steel Flanged Check Valve for Water Oil Gas

• Overview
• Product Description
• Main Product
• Company Profile
• Certifications
• Exhibition
• Packaging & Shipping
• FAQ

Overview

Basic Info.

Model NO.	H44W-16P
Material	Stainless Steel304316
Connection Form	Clamp
Structure	Swing
Pressure	Low Pressure
Function	Ddcv Double Lobe, Nrvr Silence, Sfcv Rubber Lobe
Sealing Form	Bellows Globe Valve
Flow Direction	Reversing
Standard	ASTM Bsdin Isojis
Application	Industrial Usage, Water Industrial Usage, Household Usage
Nnwer	Auto
Selling Units	Single Item
Port Size	Custom Size
Color	Grey
Service	24hours Online Service
Customized Support	OEM, Odmobm
Place of Origin	Zhejiang, China
Working Pressure	1.6MPa
Temperature of	Media -38~+650celsius
Product Name	Check Valve
Modelnumber	H44W-16pdn40316L
Medium	Water Oil Gas
Transport Package	Carton Box
Specification	Customized
Trademark	Khd
Origin	Wenzhou, Zhejiang
HS Code	7307230000
Production Capacity	500000PCS/Year

Packaging & Delivery

Package Size100.00cm * 50.00cm * 100.00cm Package Gross Weight1.000kg Lead Time 10 days (1 - 10 Pieces)
To be negotiated ( > 10 Pieces)

Product Description

Product Description

The flap-type check valve is an automatic valve used in industrial pipeline systems to prevent the backflow of media. It relies on the self-flowing force of the medium to automatically open and close the valve disc, without the need for manual operation. It can effectively protect key equipment such as downstream pumps, compressors, boilers, etc. from damage caused by reverse fluid impact, and avoid safety accidents caused by sudden pressure increase in the pipeline system. It is an indispensable safety protection device in the fluid transportation system.Structure and Materials
Body: The valve body is manufactured through a precise integral casting process. The standard materials include WCB carbon steel (for normal working conditions) and CF8 (304)/CF8M (316) stainless steel (for corrosive working conditions). Special materials such as ductile iron, low-temperature steel, and duplex steel can also be selected. It is suitable for different temperature, pressure, and medium environments.Opening and closing components: The valve disc and valve seat are processed by matching grinding. The standard configuration includes stainless steel valve discs and pins. Hard alloy clad sealing surfaces can be selected to significantly enhance wear resistance and service life. Some large-diameter models are equipped with buffering devices to effectively reduce water hammer impact.Connection methods: Standard flange connections are available according to national standards (GB/T), American standards (ANSI), and German standards (DIN). The sealing surface forms include RF raised surfaces, FM concave surfaces, and RJ ring connection surfaces. It can be seamlessly connected to the vast majority of industrial pipeline systems worldwide.Auxiliary components: High-strength bolts and nuts are provided, along with temperature-resistant and corrosion-resistant sealing gaskets. The valve cover adopts a bolt-fastening structure, facilitating disassembly and maintenance.

Working principle
When the medium is flowing in the forward direction, the fluid pressure drives the valve disc to rotate upward around the pin shaft and open, allowing the medium to pass through smoothly. When the medium stops flowing or flows in reverse, under the combined effect of its own gravity and the reverse medium pressure, the valve disc rotates rapidly to close, blocking the fluid passage and thus achieving the function of preventing the reverse flow of the medium.AdvantagesUltra-low flow resistance, energy-saving and efficientWith the fully-through-flow streamlined valve body design, the fluid passage is smooth without any dead corners, and the pressure loss is extremely small (≤ 0.015 MPa), which is much lower than that of the lift type check valve. This can significantly reduce the operating energy consumption of the pipeline system, especially suitable for large-diameter and high-flow conditions.Quick opening and closing, good anti-backflow effectThe valve disc has a large rotation angle, fast opening speed, short closing response time, and can quickly cut off the passage at the initial stage of reverse flow of the medium, effectively preventing the impact of reverse flow on the upstream equipment and ensuring the safety of the system.Reliable sealing, zero leakage guaranteeThe valve disc and valve seat are precisely matched and ground, with high sealing surface fit, and the hard sealing structure leakage rate can reach ANSI Class VI level; an optional soft sealing structure can be selected to achieve zero leakage, suitable for extremely high-sealing requirements in the working conditions.

Applicable Medium	Water
Working Temperature	Other, -38℃~+450℃
Material	Other (Stainless Steel 304/316)
Connection Type	Clamp
Structure	Swing
Pressure Environment	Low Pressure
Function	Ddcv Double Lobe, Nrvr Silence, Sfcv Rubber Lobe
Sealing Form	Bellows Globe Valve
Flow Direction	Reversing
Standard	Other (ASTM, BS, DIN, ISO, JIS)
Application	Industrial Usage, Water Industrial Usage, Household Usage
Transport Package	Carton Box
Specification	Customized
Trademark	Khd
Place of Origin	Wenzhou, Zhejiang, China

Main Product

Company Profile

Huadu Valve Group Co., Ltd., based in Wenzhou, China's "Valve Capital", is a comprehensive valve manufacturer integrating R&D, manufacturing, sales, service and trade of valves and pipeline parts.After rapid growth, we have achieved large-scale, standardized, digital operation, with strong R&D, quality craftsmanship, advanced equipment, complete testing and after-sales service, ensuring a smooth cooperation experience. Our advanced management and quality systems guarantee product and service quality.Adhering to "Standardized Management, Market-Oriented, Quality & Customer Focus, Innovation-Driven Growth", we implement strict quality control. Products meet ANSI/ASME, API, ISO, GB/JB, JIS, DIN, BS and stricter internal standards, delivering cost-effective, high-quality valve solutions worldwide.Our core products include ball valves (soft/hard-sealed, trunnion/floating), butterfly valves, gate valves, globe valves, check valves, oxygen valves, Y-strainers, and electric/pneumatic valves, widely used in oil, gas, chemical, power, metallurgy, defense, pharmaceutical and pipeline sectors.Upholding "Pursue Excellence, Put Users First" and the principle of "High Quality, Competitive Price, Complementary Advantages, Mutual Benefit", we welcome customers worldwide to visit, cooperate and create a bright future together!

Certifications

Exhibition

Packaging & Shipping

FAQQ: What materials are available for valves? What media are they compatible with?
A: Standard materials include cast steel, stainless steel, special alloys, etc. They are compatible with water, oil, steam, gas, acid and alkali media; custom materials are available for special media.
Q: What are the pressure and temperature ranges of the valves?
A: The rated pressure and temperature of valves are determined by the body material. Our full range of valves covers various working conditions and can be customized as required.
Q: What if I don't know how to select the right valve?
A: Provide the medium, pressure, temperature and connection method, and our customer service will assist with accurate selection free of charge.
Q: Is non-standard customization supported?
A: Non-standard customization is available for dimensions, connection methods, actuation modes (manual/electric/pneumatic), etc.
Q: Are the products supplied with certificates of conformity?
A: All ex-factory valves are provided with quality inspection reports and certificates of conformity, complying with industrial standards.
II. Orders & Payment
Q: Is there a minimum order quantity (MOQ)?
A: No mandatory MOQ for standard models; MOQ for non-standard customized products is determined based on actual production requirements.
Q: What payment methods are accepted?
A: We support business-to-business transfers, online payments, and deposit + balance payment settlement.
Q: How long is the quotation valid for?
A: Standard quotations are valid for 7–15 days. You will be notified in advance of any fluctuations in raw material prices.
Q: Can value-added tax (VAT) invoices be issued?
A: 13% special VAT invoices can be issued. Just provide the invoicing information after placing the order.
Q: Can a placed order be modified or canceled?
A: Modification or cancellation can be negotiated before production; for orders already scheduled, handling shall be in accordance with the contract.III. Logistics & Delivery
Q: How soon will the order be shipped after placement?
A: Standard in-stock items are dispatched within 24–48 hours; customized products take 7–15 working days, subject to the contract.
Q: Who bears the freight cost?
A: Free shipping can be negotiated for bulk orders; freight for small orders is subject to actual logistics quotes.
Q: How are the products packaged?
A: Moisture-proof and shock-proof industrial packaging is used to prevent damage from bumps during transportation.
Q: Can logistics information be tracked?
A: A logistics tracking number will be provided after shipment, allowing real-time tracking of delivery progress.
Q: What should I do if the goods are damaged upon receipt?
A: Inspect the goods on the spot upon signing. Take photos as evidence for damaged items, and we will arrange free re-delivery or return/replacement.
IV. After-Sales Service
Q: How long is the warranty period for the valves?
A: Standard products come with a 12-month warranty. Man-made damage or improper installation is not covered by the warranty.
Q: How to handle valve malfunctions?
A: Provide a fault description and photos. Our technicians will offer remote guidance; if unresolved, the product can be returned to the factory for repair.
Q: Is return and exchange supported?
A: Unconditional return and exchange for quality issues. Non-quality issues can be negotiated for return/exchange if the product does not affect resale.
Q: Is installation and operation guidance provided?
A: Product manuals are included, and free online technical guidance for installation is available.
Q: Can spare parts be purchased separately later?
A: Separate supply of spare parts such as valve cores, seals and actuators is supported. Long-term partners can enjoy preferential prices.