Product Name
UPVC Ball Valve — Pneumatic Actuated, True Union
Product Summary
Pneumatic UPVC ball valve with true union ends. A UPVC valve paired with a rack-and-pinion air actuator for automated on/off duty on chemical lines that corrode stainless steel — acids, alkalis and seawater.
The true-union body unscrews at both ends, so the whole valve drops out of the line for cleaning or seat replacement — no cutting the pipe.
UPVC body · pneumatic (DA / SR) · true union · 1/2″ – 2″ · EPDM / FKM seals
Actuator sizing (T32 / T40 / T50) and the full dimension table are in the PDF dimension sheet on this page.
ISO 9001 · CE · Manufacturer since 1999 · Made in Taiwan
Product Description
This pneumatic UPVC ball valve pairs a double-union UPVC valve with a rack-and-pinion air actuator for automated on/off duty on aggressive chemical lines. UPVC handles acids, alkalis, seawater and other solutions that corrode stainless steel, and a quarter turn of the actuator opens or closes the line on a signal from your PLC or solenoid.
The double-union (true union) body unscrews at both ends, so the valve drops out of the line for cleaning or seat replacement without cutting the pipe. Seats and O-rings are EPDM or FKM (Viton), sizes 1/2″ to 2″. For metal lines, see our 316 stainless pneumatic ball valve, or browse all pneumatic ball valves.
Valve Specifications
| Type | UPVC ball valve — double union, pneumatically actuated |
| Model | UPVC-PDU |
| Size range | 1/2″ – 2″ |
| Body & ball | UPVC (unplasticized polyvinyl chloride) |
| Seat | EPDM or FKM (Viton) — both in stock |
| O-rings | EPDM or FKM (Viton) — both in stock |
| End connection | Double union (true union) — removable in line |
| Media | Acids, alkalis, seawater and chemical solutions |
Actuator Specifications
| Type | Rack-and-pinion, aluminum alloy body |
| Acting | Double Acting (DA) or Spring Return (SR) |
| Air supply | 4 – 8 bar (about 58 – 116 psi) |
| Actuator size by valve | T32 (1/2″–3/4″), T40 (1″), T50 (1-1/4″–2″) |
| Options | Solenoid valve, limit switch box, positioner |
Application Fields & Locations
- Chemical dosing & transfer: automated on/off on acid and alkali lines where stainless steel would corrode.
- Water & wastewater treatment: chlorination, dosing and backwash lines.
- Seawater & desalination: saline service where UPVC outlasts metal.
- Plating & surface finishing: aggressive process baths and drains.
FAQ
Why UPVC instead of stainless steel? UPVC resists acids, alkalis and salt water that pit and corrode stainless steel, and it is lighter. For those chemical and seawater lines it outlasts metal; for high-temperature or high-pressure duty, choose a stainless valve instead.
What does the double union do? Both ends unscrew (true union), so the whole valve lifts out of the line for cleaning or seat replacement without cutting the pipe — the seats and ball are serviceable in place.
Double-acting or spring-return? Double-acting (DA) uses air for both strokes and holds its last position if air is lost. Spring-return (SR) uses springs for the return stroke, so on air loss the valve moves to a preset open or closed position.
Can I add a solenoid valve or limit switch? Yes. The actuator accepts a solenoid valve for control, a limit switch box for position feedback and a positioner for modulating service — tell us your control setup when you request a quote.
What are the seat and O-ring materials? The seats and O-rings are EPDM or FKM (Viton). Tell us your medium and temperature and we will confirm the combination suits your process.
What is the minimum order? No minimum order quantity — we accept orders of any size, including small trial orders. For small orders, freight is arranged and paid by the buyer. Payment is by T/T — 30% on order confirmation, 70% before shipment.
Sample Policy
We are happy to provide product samples for customers to evaluate quality or conduct testing. The process typically begins with a quotation based on the customer’s specifications.
If the pricing is acceptable, we can offer samples either free of charge or at a cost depending on the product type and availability.
Shipping fees are borne by the customer.
Order Process
After confirming the product requirements and other details with the customer, we will issue a Sales Confirmation for approval. Once confirmed, the customer is required to pay a 30% deposit to proceed with production.
When mass production is completed and the goods pass inspection, the customer must pay the remaining 70% balance before shipment is arranged.
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FAQ
A. How can I request a quote?
Please provide a detailed inquiry sheet including product specifications, materials, quantities, and any special requirements. We will offer a quotation based on your request.
B. What are your quotation terms?
Our quotations are typically based on FOB terms. However, we can also offer CFR, CIF, or other Incoterms upon request.
C. What is your Minimum Order Quantity (MOQ)?
MOQ depends on the product. We operate on a made-to-order basis, and trial orders are welcome. For smaller orders, freight is arranged and borne by the buyer.
D. What are your payment terms?
By T/T – 30% down payment upon order confirmation, and 70% balance before shipment.
E. What is your lead time?
Lead time depends on order quantity and specifications. We will confirm the exact schedule when you request a quote.
Want to know more?
If you’re interested in any of our products or services, simply fill out the form below. Our team will get in touch with you as soon as possible to provide the information you need.