Quarter-turn PVC-U shutoff with removable union ends — the standard, low-cost workhorse for water, irrigation, pool, and general chemical PVC piping systems.
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 True Union PVC Ball Valves Manufacturers and Custom True Union PVC Ball 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
True union PVC ball valves are quarter-turn shutoff valves molded specifically from rigid PVC-U, sized for the water treatment, irrigation, pool and spa, and general chemical-transfer markets where PVC is the default piping material. The valve pairs a floating ball with PTFE seats inside union end connectors that thread or solvent-weld onto the adjoining PVC pipe, keeping the whole system in a single, chemically compatible material from pipe to valve body.
The defining feature is the true union body: two union nuts thread onto end connectors so the valve center section can be lifted out of the line by hand, without cutting pipe or disturbing solvent-welded joints on either side. This makes routine cleaning, seat and seal replacement, or full valve swap-out a quick job, which is why true union PVC valves are the standard choice for pool filtration, irrigation manifolds, and PVC chemical dosing skids where valves are opened for service more often than metal alternatives.
PVC-U pipe and fittings dominate water, pool, and irrigation systems, and a matching PVC valve keeps the whole line chemically and thermally consistent.
Every wetted part is selected to match PVC-U pipe systems, keeping chemical compatibility consistent from pipe to seat.
| Component | Material | Role | Notes |
| Body & Union Nuts | PVC-U | Carries the ball, seats, and pipeline connection | Same material as standard PVC-U pressure pipe |
| Ball & Stem | PVC-U | Rotates to open, throttle, or shut off flow | Molded to a smooth, low-friction bore |
| Seats | PTFE / reinforced PTFE | Seals against the ball on both sides | Self-lubricating, broad chemical resistance |
| Seals & O-Rings | EPDM or FPM (Viton) | Seals the stem and union joints | EPDM standard, FPM for oils and select solvents |
| Item | Description |
| Valve Type | Two-way true union PVC-U ball valve |
| Body Material | PVC-U |
| Ball Material | PVC-U |
| Seat Material | PTFE / reinforced PTFE |
| Seal Material | EPDM / FPM (Viton) |
| Size Range | DN15 – DN100 (1/2 inch – 4 inch) |
| End Connection | Socket (solvent weld) or threaded (BSP / NPT) |
| Working Pressure | Up to 235 psi (16 bar) at 20°C, rating decreases with temperature |
| Working Temperature | 0°C to 60°C |
| Sealing Performance | Bubble-tight (zero-leakage) shutoff |
| Operation | Manual lever standard; ISO 5211 pad on larger sizes |
| Union Design | Twin union nuts allow tool-free removal from the line |
Both are PVC-U ball valves, but the union ends change how the valve is installed and serviced.
| Factor | True Union PVC Valve | Single-Body PVC Valve |
| Removal for Service | Unscrew union nuts, lift the valve out by hand | Must cut pipe or use unions elsewhere in the line |
| Installation Alignment | Some tolerance for minor pipe misalignment | Requires precise alignment before solvent welding |
| Body Length | Slightly longer to accommodate union nuts | More compact, shorter face-to-face |
| Typical Use | Systems needing periodic valve service or replacement | Permanent, low-maintenance shutoff points |
| Cost | Modestly higher for the added union hardware | Lower initial cost |
| Field Serviceability | High — seats and seals can be replaced in place | Lower — often replaced as a whole unit |
Twin union nuts on either side of the center body let the ball and seat assembly be lifted out of the pipeline as a unit.
Consistent inspection keeps sealing performance and dimensional accuracy uniform across every batch.
Mid- and large-size bodies share a standard ISO 5211 mounting pad, so operation can be upgraded from manual to automated later.
| Operation Type | Best Suited For | Key Characteristics |
| Manual Lever | Pool, irrigation, and general water shutoff | Lowest cost, simple hand operation |
| Pneumatic Actuator | Automated irrigation zones or dosing skids | Fast cycling where compressed air is available |
| Electric Actuator | Remote-controlled filtration or zone valves | Wired for control panel or timer integration |
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 and palletized for container loading.
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 Union connections on both ends for full
Overview CPVC shutoff engineered for hot water a
Overview A free-moving ball that seals the line
Overview A dual-connection PVC valve with both t
Overview Built for corrosive and high-purity flu
Overview A single-piece flanged body for direct
Overview A CPVC flow path for diaphragm valve se
Overview A flanged PVC-U body with a flexible di
Overview A reinforced body engineered for the up
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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
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