Check Valve Manufacturer | Non-Return Valves for Critical Piping Systems
OEM/ODM Check Valve Manufacturer
Since 2003, we’ve engineered high-performance swing, lift, wafer, and ball check valves. With years of specialized expertise, our entire product range is manufactured and tested in strict accordance with API, DIN, JIS, and ISO standards, ensuring global compatibility and reliability. We offer full OEM/ODM capabilities, from material selection to custom end connections, to meet your most demanding project specifications.
Our Check Valve Portfolio
Our Check Valves Filtered By Attributes
Why choose us?
Deliver reliable, high-performance flow control through precision-engineered check valves, while also empowering your engineering team with fully customized, project-specific solutions that ensure seamless system integration.
100%
Pressure Tests
API
Fire Type Approval (API 607/6FA)
ISO
Low Fugitive Emissions (ISO 15848)
FLEX
Fast Delivery & Custom Service
Industry Check Valve Applications
Serving upstream, midstream, and downstream operations, our check valves provide reliable backflow prevention in crude oil, natural gas, and refined product pipelines. Engineered to withstand high pressures and sour service, they ensure safe, uninterrupted flow in demanding energy applications.
Available in full-port configurations for pigging and metal-seated designs for abrasive media, meeting API 6D specifications with fire-safe certification for critical safety loops.
Handling aggressive acids, solvents, and hazardous intermediates demands absolute sealing integrity. Our check valves are built with corrosion-resistant stainless steel and alloy grades for long-term reliability in reactor feed lines, mixing systems, and transfer stations.
With PTFE, PEEK, and metal seat options, we provide tailored solutions for every chemical service — from corrosive hydrochloric acid to high-temperature hydrocarbon cracking.
From high-temperature steam to circulating cooling water, our check valves protect turbines, boilers, and condensers from reverse flow damage. Pressure seal bonnet and hardfaced seating are available for elevated temperature services.
Our lift and piston check valves are favored in feedwater and extraction steam lines, where rapid closure and zero-leakage sealing are essential for plant efficiency and safety.
From potable water and wastewater to desalination RO trains, our check valves deliver consistent, low-maintenance service. Corrosion-resistant coatings and rubber-lined discs provide bubble-tight sealing in low-pressure applications.
For sludge and grit-laden streams, our ball check valves with self-cleaning rolling action prevent fouling and extend service intervals, reducing ownership costs for treatment plants.
Check Valve Selection Tips
Water Hammer Prevention
Select spring-assisted or silent check valves for systems prone to pressure surges. Rapid closure before flow reversal drastically reduces surge, protecting pumps, piping, and downstream equipment from damage.
Frequently Asked Questions
Sizing a check valve is based on flow rate and allowable pressure drop. A common mistake is simply matching the pipe size — this often leads to an oversized valve, causing the disc to flutter and wear out prematurely. An undersized valve creates excessive pressure drop and restricts flow.
Evaluate your system’s minimum and maximum flow rates, then consult the manufacturer’s Cv data to select a size that operates efficiently across that range. As a rule of thumb, the valve should run at 60%–80% open under normal conditions. Also consider fluid viscosity — thicker fluids need larger ports. When in doubt, contact our technical team with your system specs for a verified recommendation.
Water hammer occurs when flow suddenly stops or reverses, and the check valve disc slams shut against the seat, creating a high-pressure shockwave that travels through the piping system. This is often caused by using a valve that closes too quickly for the system’s flow velocity, or by installing a swing check valve in a long piping run where reverse flow velocity builds up before the disc fully closes.
To prevent water hammer:
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Choose a “silent” or “non-slam” check valve — these feature a spring-assisted disc that begins closing before the flow fully reverses, avoiding rapid impact against the seat.
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Consider a slow-closing check valve or a valve with an external dashpot or dampening mechanism that controls closure speed.
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Ensure the valve is correctly sized — oversizing increases the distance the disc travels, worsening slam; proper sizing keeps the disc near the seat at normal flow.
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For pump discharge applications, a combination of a check valve and a control valve with a controlled ramp-down can eliminate water hammer entirely.
If you are experiencing water hammer in an existing system, start by verifying that the flow velocity does not exceed 10–15 ft/s (3–4.5 m/s) for liquid services — this is often the root cause.
Yes, but it depends on the type of check valve. Most spring-loaded check valves can be installed in any orientation, including vertical, because the spring assists disc closure regardless of position. However, swing check valves rely on gravity to return the disc to the seat, so they are typically recommended for horizontal pipelines only. If a swing check valve must be installed vertically, flow direction must be upward to assist the disc in closing properly when flow stops.
Other types have different constraints:
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Lift check valves are generally suitable for vertical lines with upward flow
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Wafer or dual-plate check valves often allow vertical installation but check the manufacturer’s specification
Always review the manufacturer’s installation instructions for specific orientation requirements before ordering.
Cracking pressure is the minimum upstream pressure required to just open the valve and allow flow. It is a critical selection parameter because it determines the pressure threshold at which the valve will operate. If your system has a low inlet pressure, a check valve with a cracking pressure that is too high will not open, starving the downstream system. Conversely, too low a cracking pressure might lead to premature opening or disc flutter.
As a general rule, choose a check valve with a cracking pressure of approximately 10% to 20% of the minimum operating pressure of your system. Spring-loaded check valves typically have higher cracking pressures than swing or silent check valves, which rely on gravity or flow dynamics. Always verify this parameter against your system’s low-flow conditions — especially during startup or turndown scenarios.
The core difference lies in their function and operation. A check valve is an automatic, self-actuating safety device that allows fluid to flow in only one direction to prevent backflow — it requires no manual intervention and operates entirely based on line pressure. A ball valve, on the other hand, is a quarter-turn manual or actuated valve that an operator uses to start, stop, or throttle flow — it does not respond to system conditions automatically.
In practice, these two valves serve complementary roles and are often installed together. A ball valve upstream of a pump provides isolation for maintenance, while a check valve downstream prevents reverse flow when the pump shuts off. Using one as a substitute for the other is a common design error: a ball valve left partially open offers no backflow protection, and a check valve cannot be used to shut off flow for service.
If you are selecting a valve for a pump discharge line, you will typically need both — a ball valve for isolation and a check valve for backflow prevention. They work together, not in competition.
| Stage | Procedure | Description |
|---|---|---|
| Before Production | PMI (Positive Material Identification) test | Raw material verification |
| In-Production | Dimensional checks | At critical machining stages |
| Post-Production | High-pressure hydrostatic shell test (1.5× rated pressure) Low-pressure air seat test (0.6 MPa) to verify shut-off Optional tests: helium leak test (ISO 15848), fire-safe test, or cryogenic test | Final assembly testing |
| Quality Inspection | Marking verification, coating/painting thickness measurement, and preparation of traceable test reports | Visual & documentary check |
All test records are archived for a minimum of 10 years and can be provided with each shipment. Or you can specify any third-party test institutions.
Our manufacturing facility is certified to ISO 9001:2015 for design, production, and after-sales service of industrial valves. Additionally, we hold ISO 14001:2015 (environmental management) and ISO 45001:2018 (occupational health and safety). All our ball valves for the European market comply with PED 2014/68/EU, and we can supply valves with ATEX certification for explosive atmospheres upon request. Our quality system is audited annually by third-party notified bodies.
Absolutely. For standard ball valves, we can offer off-the-shelf samples of common sizes (1/2″ to 4″) at a discounted price, with a refundable deposit that can be credited toward a future bulk order. For custom or larger sizes, we accept small trial orders (as few as 2–5 pieces) after a non-recurring engineering (NRE) fee is agreed. The NRE fee will be waived once the customer proceeds to a production order of 50 pieces or more.
We offer flexible payment terms based on order value and customer history. For standard orders: 30% deposit by T/T (wire transfer) with 70% balance before shipping. For larger or repeat customers, we can consider 20% deposit + 80% balance payment.
- For standard models, the minimum order quantity (MOQ) is usually 100 pieces per size. For sizes that are in stock, it takes 3 to 5 business days to ship after you place your order. Our usual lead time for making standard catalog valves that aren’t in stock is 15 to 25 business days after we get your order and approve the drawing.
- Custom models (with special materials, pressure classes, actuator mounting, custom logos, etc.): The minimum order quantity (MOQ) varies, so please get in touch with our sales team for a full quote. The lead time is usually 15 to 45 days, depending on how complicated the process is. Also, we offer a mixed-model consolidation service for distributors to help them deal with their inventory problems.
