PRODUCT FEATURES
Threaded Swim Check Valve — Product Features
1. **Full-bore design, low flow resistance**: Straight-through flow path with minimal pressure loss, suitable for high-flow applications.
2. **Swing-type construction**
The disc swings on a rocker arm hinge, allowing for smooth opening and closing; **installation in horizontal pipework only is recommended** (not recommended for vertical risers, as gravity cannot assist in closing).
Product Feature
3. **All internal components are fully enclosed within the valve body**, with no protruding shafts, resulting in a low risk of external leakage and reliable sealing.
4. **Material options**
Valve body and disc in SS304 / SS316; hinge pin in stainless steel; seals in PTFE soft seal or metal hard seal.
5. **Nominal sizes and pressure ratings**
1/2‘–4’; PN16 / 200 WOG.
OPERATING PRINCIPLE
How Threaded Swim Check Valve Works
The H14W horizontal swing check valve relies on **the thrust of the medium + the weight of the disc** to open and close automatically; it has no handwheel.
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1. **Forward flow**
The medium flows in the direction indicated by the arrow on the valve body; the thrust of the fluid pushes the hinged disc upwards to swing open, allowing the medium to flow smoothly through the valve body.
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2. **Prevention of backflow**
When the medium stops flowing or flows in the opposite direction, the forward thrust disappears; under the combined effect of **its own weight** and the reverse medium pressure, the valve disc swings downwards around the hinge, pressing tightly against the seat sealing surface, closing the flow passage and preventing backflow of the medium.
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> Key point
As the valve closes under the weight of the disc itself, it is **suitable only for horizontal pipework**; installation in vertical pipework will result in failure, as a reliable seal cannot be achieved.
ENGINEERING DATA
Technical Specifications
Technical data supplied for Threaded Swim Check Valve. Ratings and material combinations should be confirmed for the selected configuration.
| PARAMETER | SPECIFICATION |
|---|---|
| Product type | Threaded horizontal check valve |
| Size range | “1/2–4” (DN15–DN100) |
| Thread specifications | BSPT / BSPP / NPT |
| Body material | WCB/CF8 / CF8M |
| Working Pressure | 1.6 MPa |
| Working Temperature | 0°C to 120°C |
| Design and Manufacture | ASME B16.34 |
| Inspection and Testing | API 598 |
| Body/Casing Test Pressure | 1.6 MPa |
| Seat Seal Test Pressure | 1.6 MPa |
| Air Tightness Test Pressure | 1.2 MPa“”” |
MECHANICAL DIMENSIONS
Dimensions & drawings.
Compare connection size with the corresponding overall length, bore and handle clearance dimensions from the supplied drawing.
Dimension chart
| SIZE | DN | H | L | Φd |
|---|---|---|---|---|
| 1/2″ | DN15 | 43.5 | 63 | 15 |
| 3/4″ | DN20 | 46.5 | 71 | 20 |
| 1″ | DN25 | 51.5 | 80 | 24 |
| 1-1/4″ | DN32 | 58.5 | 99 | 31.5 |
| 1-1/2″ | DN40 | 66 | 111 | 37.5 |
| 2″ | DN50 | 71.5 | 125 | 46 |
| 2-1/2″ | DN65 | 91 | 159 | 62.5 |
| 3″ | DN80 | 97 | 185 | 81 |
| 4″ | DN100 | 114 | 223 | 107 |
Refer to the supplied dimension chart.
COMPONENT BREAKDOWN
Parts & Materials
Component names and materials from the supplied product parts list.
| NO. | PART | MATERIAL |
|---|---|---|
| 01 | Body | CF8 / CF8M |
| 02 | Disc | CF8 / CF8M |
| 03 | Pin | 304 / 316 |
| 04 | Sealinggrring | PTFE |
| 05 | Bonnet | CF8 / CF8M |
APPLICATIONS
Applications
Applicable media: the supplied document lists the following fluids. Actual compatibility depends on selected materials, concentration, temperature, pressure and the specific service conditions.
Application – Water Circulation
Cooling water, circulating water, drinking water and neutral purified water.
Application – Steam Piping
Clean, low-temperature saturated steam, subject to the product’s confirmed temperature and pressure limits.
Application – Compressed Air
Compressed air and nitrogen; verify compatibility for each system.
PURCHASING SUPPORT
Frequently Asked Questions
Find answers to common questions about sizing, materials, threaded connections and operating conditions.
What is H14W threaded horizontal swing check valve?
H14W threaded horizontal swing check valve is an automatic hinged swing non-return valve with female threaded ends. It prevents fluid backflow automatically to protect pumps and pipeline equipment.
What is its working principle?
Forward fluid pushes the hinged swing disc to open and allow medium to pass. When flow stops or reverses, the disc swings back by its own weight plus reverse fluid pressure, presses tightly against the seat to block backflow. It relies on gravity for closing.
What are the main product features?
Full bore design, low pressure drop and large flow capacity. Hinged swing disc structure, simple and durable. No handwheel, fully automatic operation. Compact threaded connection for easy installation. Only suitable for horizontal pipelines.
Material options?
Standard SS304, optional SS316. Body & disc: stainless steel; hinge pin: stainless steel; seat: PTFE soft seal or metal hard seal.
Thread standard?
BSPT/BSPP (G) / NPT available. Please specify thread type when placing order.
Size range?
1/2″~ 4″.
Working temperature range?
PTFE seat: 0℃ ~ 100℃. Metal hard seal can withstand higher temperature.
Applicable media?
Water, compressed air, natural gas, oil, low-pressure saturated steam, weakly corrosive fluid. Not suitable for media with large solid particles, which may scratch sealing surface.
Can it be installed horizontally and vertically?
Not recommended. It depends on disc gravity to close. Vertical installation will cause unreliable sealing and backflow leakage.
What is the main function?
Prevent fluid backflow, protect pumps and compressors, reduce water hammer impact in pipeline.
Do you carry out 100% leakage test?
Yes, every valve passes air tightness test before packing. Hydraulic test available upon request.
MOQ?
Small MOQ acceptable, mixed sizes allowed in one order.
Lead time?
Normally 7–15 days after deposit, subject to order quantity.
Packing method?
Each valve in plastic bag + individual small box, packed in export carton. Wooden pallet optional.
Can we make OEM logo?
Yes, logo can be engraved on valve body. OEM & ODM available.
Threaded Swim Check Valve
“The H14W threaded horizontal non-return valve (swing-type threaded non-return valve) is a **self-operating one-way valve**, featuring BSPT/BSPP/NPT internal threaded connections at both ends and an internal rocker arm and swing-type disc structure, eliminating the need for a handwheel. When the medium flows in the forward direction, it pushes the disc open, allowing the medium to pass through unimpeded; should the medium flow in the reverse direction, the disc, driven by its own weight and the reverse flow pressure, rotates about its axis to seal against the seat, preventing backflow and protecting pumps and pipework from backflow impact.
Type: Threaded horizontal check valve
Material: CF8/CF8M stainless steel
Nominal diameter: 1/2”–4” (DN15–DN100)
Rated pressure: 1.6 MPa (PN16)
Connection type: Threaded connection (BSPT / BSPP / NPT)
