Plastic lift check valves for vertical upward-flow lines, with a guided disc that closes by gravity and needs no spring, ideal for pump risers and sump discharges.
Ningbo Baodi Plastic Valve Co., Ltd. traces its origins back to 1979, with its predecessors being Zhenhai Chemical Valve Factory and Beilun Plastic Valve Factory. The company is one of the earliest Vertical Industrial Check Valves Manufacturers and Custom Vertical Industrial Check Valves Factory in China to design and produce industrial plastic valves and receive acceptance from the Ministry of Chemical Industry. In 1979, the company manufactured its first plastic diaphragm valve, which passed the technical appraisal of the Ministry of Chemical Industry in 1983. In 1992, the company invented the one-piece flange ball valve, a structural design that has since become the most widely used plastic valve product in chemical-related industries. The development history of the company and its predecessors also represents an important chapter in the application of plastic valves in China's industrial production.
In 2006, the company expanded its product line to cover industrial plastic pipes and fittings, becoming one of the first domestic enterprises to apply CPVC material in the production of industrial-grade piping valves. Over more than 40 years since its establishment, the company has designed and manufactured various plastic valves for the most demanding industries. It has served tens of thousands of enterprises both domestically and internationally, exporting to more than 60 countries, and has consistently remained a leading manufacturer of industrial thermoplastic valves and piping systems. Our professional service and stable quality have always been well received and recognized by customers.
Baodi ranks among the global leaders in the number of product categories, capable of fully covering industrial plastic pipe and valve requirements. The company has obtained ISO 9001, ISO 14001, and ISO 45001 system certifications, as well as the national special equipment pressure piping component manufacturing license. It is recognized as a National High-Tech Enterprise and a Ningbo City Specialized and Sophisticated Enterprise. Baodi is a principal drafter of the national standard for plastic diaphragm valves and the chemical industry standards for plastic diaphragm valves, plastic ball valves, and plastic check valves.
Design Idea
2D Drawing
3D Modeling
Mold Fabrication
Prototype Testing
Full-scale production
Vertical industrial check valves are designed for mounting in vertical lines with flow running upward. A guided disc or poppet lifts straight up off its seat when forward flow arrives and drops back by its own weight when the flow stops, so no spring or hinge is needed. The guided, in-line motion keeps the element centered and gives repeatable sealing in pipe runs where a hinged swing disc could hang open.
Vertical risers are common wherever a pump sits below the discharge point, such as sump pumps, wet-well pumps, and tank transfer systems. Mounting the check valve in the vertical run keeps it close to the pump and lets gravity do the closing. The valve must be installed in the vertical position with flow upward, and it is not suited to horizontal or downward flow.
Risers and upward-flow lines where gravity can be counted on to close the valve.
The disc must be heavy enough to close by gravity yet light enough to lift, so disc and body materials are matched to the fluid.
| Component | Options | Selection Basis | Notes |
| Body | PVC-U, CPVC, PP, PVDF | Fluid chemistry and temperature | Vertical mounting only |
| Disc / Poppet | Matched plastic or elastomer-faced | Weight and chemical resistance | Guided to stay centered |
| Seat Seal | EPDM, FPM | Fluid and temperature | O-ring or molded seat |
| Guide | Matched plastic | Alignment of disc travel | Prevents tilting and chatter |
| Item | Description |
| Valve Type | Vertical lift type plastic check valve |
| Body Material | PVC-U, CPVC, PP, or PVDF |
| Seat Seal Material | EPDM or FPM |
| Size Range | DN15 – DN150 (1/2 inch – 6 inch) |
| End Connection | Socket, threaded, or flanged |
| Working Pressure | Up to 150 psi (10 bar) at 20°C, rating decreases with temperature |
| Working Temperature | 0°C to 90°C, material dependent |
| Orientation | Vertical only, flow upward |
| Closing Behavior | Gravity closing, guided disc |
| Cracking Pressure | Depends on disc weight and size |
Both are gravity-closing designs; the lift check stays centered in vertical risers while the swing check suits horizontal lines.
| Factor | Vertical Lift Check | Swing Check |
| Mounting | Vertical, upward flow only | Horizontal, or vertical upward |
| Element Motion | Straight up and down, guided | Pivots on a hinge |
| Closing | Gravity | Gravity and back pressure |
| Pressure Loss | Moderate | Very low |
| Chatter Tendency | Low, guided | Can flutter at low velocity |
| Best Use | Pump risers and vertical lines | Horizontal full-bore lines |
A guided disc lifts up with forward flow and drops back onto the seat when flow stops.
Disc travel, guide fit, and seat sealing are verified on every vertical check.
Disc weight and seat material are matched to the fluid and the pressure available to open the valve.
| Option | Best Suited For | Key Characteristics |
| Standard Disc | Clean water and chemicals | Gravity closing |
| Elastomer-Faced Disc | Quiet, tight seating | Soft contact with the seat |
| FPM Seat | Oils and some solvents | Broader chemical range than EPDM |
Payment: T/T (bank transfer), L/C, and PayPal are accepted, with flexible terms for repeat orders. A deposit is typically required to confirm production.
Shipping: Sea freight (FCL/LCL) for bulk orders, air freight for urgent shipments, and express courier for samples. Valves are cartoned or crated depending on size.
Delivery: Shipment from the nearest available port or airport, with door-to-door, FOB, CIF, or EXW terms on request.
Each valve is covered under a standard warranty against manufacturing defects in material and workmanship, generally valid for 12 months from the shipment date.
Overview Automatic backflow prevention in corros
Overview Built for corrosive and high-purity flu
Overview CPVC shutoff engineered for hot water a
Overview The full diaphragm valve range, from bo
Overview A threaded-end diaphragm body sized for
Overview A spring-assisted element that closes f
Overview A free-moving ball that seals the line
Overview A hinged disc that swings clear of the
Overview Handwheel-operated diaphragm shutoff fo
Share your size, riser orientation, and fluid, and get a configuration recommendation.
Start your cooperation journey with Baodi
Contact
baodivalve@bdsjfm.com
+86-574-86817753
+86-574-86812190
After-Hours Hotline：
+86-18395898313
NO.42 Yongjiang Road, Beilun,Ningbo city, Zhejiang province,P.R.China
Custom Vertical Industrial Check Valves Manufacturers
