At a Glance

• Body & ball: 100% virgin PVDF (Arkema Kynar® / Solvay or domestic grade)
• Size range: DN15–DN100 (1/2″–4″)
• Pressure rating: PN10 (de-rates with temperature)
• Max temperature: up to 120°C
• Seat: PTFE — Seals: FKM or EPDM (matched to media)
• Actuation: pneumatic (double-acting / spring-return) or manual
• Connections: socket / butt fusion or threaded
• Standards: ANSI / DIN / JIS

Choose Your PVDF Grade — Pay for the Purity You Need

Not every project needs the same resin, so we mould two virgin-PVDF grades:

Imported virgin PVDF — Arkema Kynar® / Solvay. The premium choice for semiconductor ultra-pure water, zero-tolerance acid lines and any duty where resin purity and zero ion-leaching are critical. Tight molecular-weight control, proven long-term stress and chemical stability, Material Test Report (MTR) available.

Quality domestic virgin PVDF. A cost-effective option for corrosive-service projects that need genuine PVDF resistance without imported-resin pricing.

Both grades are 100% virgin — never recycled or reprocessed. Recycled PVDF has broken polymer chains: lower burst strength, higher stress-cracking risk, and impurity leaching that ruins ultra-pure water yields.

Key Features

• 100% virgin PVDF body and ball — imported (Arkema / Solvay) or domestic grade
• Continuous service up to 120°C (media-specific limits apply)
• Resists 98% and fuming sulfuric acid, 70% nitric, 40–55% hydrofluoric acid, aqua regia, halogens and chlorinated/aromatic solvents
• True union, two-piece body — service the valve without cutting or re-fusing the pipe
• Full-port bore for unrestricted, low-pressure-drop flow
• Pneumatic actuator (double-acting or spring-return); manual lever version available
• PTFE seat; FKM or EPDM seals matched to your chemistry
• Thermally fused or threaded ends (PVDF is not solvent-cemented)
• ANSI, DIN and JIS dimensions

Technical Specifications

• Body / ball: virgin PVDF (Arkema / Solvay or domestic)
• Seat: PTFE | Seals & O-rings: FKM or EPDM (media-matched)
• Size: DN15–DN100 (1/2″–4″)
• Pressure: PN10 (de-rates with temperature)
• Temperature: up to 120°C
• Actuation: pneumatic; manual option
• Standards: ANSI / DIN / JIS

Socket Dimensions (mm)

All dimensions in mm. Socket connections available in DIN, JIS, ANSI and CNS standards. d = nominal bore, l = socket depth, d1/d2 = socket diameters.

Valve Dimensions (mm)

All dimensions in mm. D = body diameter, L = end-to-end length, H = overall height with actuator. Full dimensional drawings available on request.

Operating Torque

Break torque values for actuator sizing. Add a safety factor when selecting the actuator; our engineering team can recommend the correct actuator for your operating pressure.

Chemical Resistance — What PVDF Handles

This is the reason to specify PVDF. The table summarises performance against media that defeat other plastics. For the full media-by-media table with concentrations, temperatures and seal advice, see our PVDF Chemical Resistance Guide. (◎ excellent · 〇 limited · × not suitable)

Media	UPVC / CPVC	PPH	PVDF	Seal
98% Sulfuric acid	〇	×	◎	PTFE / FKM
Fuming sulfuric acid	×	×	◎	PTFE / FKM
70% Nitric acid (to 100°C)	×	×	◎	PTFE / FKM
40–55% Hydrofluoric acid	×	〇	◎	PTFE / FKM
Aqua regia (to 100°C)	×	×	◎	PTFE / FKM
Sodium hypochlorite (high conc.)	〇	〇	◎	FKM
Chlorine / bromine / ozone	×	×	◎	FKM
Aromatic solvents (benzene, toluene, xylene)	×	〇	◎	FKM
Chlorinated solvents (TCE, carbon tet.)	×	×	◎	FKM
Hot 50% sodium hydroxide	×	〇	◎	EPDM
18 MΩ ultra-pure water	leaches ions	—	◎ inert	EPDM

Not suitable for: ketones (acetone, cyclohexanone), THF, certain ethers (diethyl ether) and strong amines (DMF, aniline, dimethylamine). For these media, ask our engineers about an alternative material.

Get the Seal Right — PVDF + FKM vs PVDF + EPDM

A PVDF valve is only as good as its weakest elastomer. The body resists almost everything; the seals do not. Match them to your media.

PVDF + FKM (Viton) — strong acids, oxidisers and halogens. Fuming and 98% sulfuric, 70%+ nitric, aqua regia and hydrofluoric acid; sodium hypochlorite, chlorine, bromine, ozone; aromatic and chlorinated solvents.

PVDF + EPDM — hot alkalis and polar media. Boiling 50% sodium hydroxide and other hot strong alkalis; hot ultra-pure water and low-pressure steam; certain amines and pyridine. FKM saponifies and fails in hot alkali — putting FKM there is the single most common PVDF valve mistake.

The ball seat is PTFE on both builds. Tell us your media and we specify the seal for you.

Why True Union Matters More on PVDF

On PVDF this feature pays for itself. PVDF cannot be solvent-cemented like PVC — every joint is thermally fused (socket or IR butt welding), which needs equipment, trained operators and downtime. With a true union valve you simply back off the two union nuts and lift the valve out for seal replacement or inspection: no cutting, no re-fusing, no draining and re-welding a live acid line. One serviceable valve can save hours of fusion work and a full shutdown — and keep technicians clear of hazardous media.

Avoid These Three Costly PVDF Mistakes

1. Premium body, wrong seal. Buyers spend on a PVDF body for hot caustic, then accept standard FKM seals — which saponify and dissolve in hot alkali within months. Rule: hot alkali → PVDF + EPDM; strong acid/halogen → PVDF + FKM.

2. Trying to glue PVDF. Crews used to UPVC/CPVC look for “PVDF cement.” There is none — PVDF’s ultra-low surface energy rejects all adhesives, which blow off under pressure. PVDF must be socket-fused or IR butt-welded. We supply welding parameters and temperature curves.

3. Cheap “PVDF” that’s actually recycled. Reprocessed resin has broken chains — it stress-cracks under heat and pressure and leaches impurities into ultra-pure water. We mould only virgin resin and provide an MTR on request.

Proven in the Field

Semiconductor ultra-pure water, Shanghai. A UPW system built with Huiya virgin-PVDF pipe, fittings and valves has held resistivity steady at 18.25 MΩ·cm since 2024 — designed and installed by Huiya, fully IR-fusion jointed, and pressure-tested to 1.5× design pressure.

Mixed-acid line, East China electronics-chemicals plant. A PVDF line carrying HF-bearing mixed acid (rated for 10 years) embrittled and leaked in year three, forcing a full-line shutdown and a seven-figure loss. Analysis traced it to impure resin with unstable molecular-weight distribution. After re-piping with Huiya valves moulded from Arkema PVDF, the line has run leak-free.

Applications & Industries

Semiconductor and high-purity ultra-pure water (UPW) loops; concentrated-acid dosing and transfer; electroplating and surface treatment; chlor-alkali and oxidiser handling; fine-chemical and pharmaceutical reactor feed and discharge lines; and any corrosive service where purity or chemical aggressiveness rules out cheaper plastics.

Installation & Jointing

PVDF is thermally fused, not glued. Joints are made by socket fusion or IR butt welding to controlled temperature and time. Used correctly, the result is a homogeneous, leak-proof joint as strong as the pipe itself. We provide welding parameters and temperature curves with every order, and the true union ends let you isolate the valve later without disturbing those welds.

Frequently Asked Questions

Can it handle 98% sulfuric or hydrofluoric acid?

Yes — virgin PVDF resists 98% and fuming sulfuric, 70% nitric and 40–55% HF, with a PTFE seat and FKM seals. Confirm your media and temperature and we specify the exact build.

Imported or domestic PVDF — which should I choose?

Imported Arkema/Solvay for semiconductor UPW, zero-tolerance acids and high-purity duty; domestic virgin PVDF for cost-sensitive corrosive service. Both are 100% virgin resin.

Why does the resin grade matter so much?

Recycled/reprocessed PVDF has broken polymer chains — lower strength, stress-cracking risk and impurity leaching. We mould only virgin resin and provide an MTR on request.

Can I service the valve without cutting the pipe?

Yes — that’s the point of true union. Back off the union nuts and remove the valve; no thermal re-fusion needed.

How is PVDF joined to the pipework?

By socket fusion or IR butt welding — never solvent cement. We supply the welding parameters.

Pneumatic or manual?

Both — a pneumatic actuator for automated on/off, or a manual lever.

Why Buy from Huiya

• Two virgin-PVDF grades (imported Arkema/Solvay or domestic) — never recycled
• Material Test Report (MTR) on request
• Custom seal configuration matched to your exact media
• Complete PVDF system — matching pipe, fittings and valves from one factory
• ANSI / DIN / JIS to your market
• Welding parameters and engineering support included
• Factory-direct pricing, flexible MOQ

Less aggressive media? The same true union ball valve is available in PPH for hot alkalis, CPVC for hot acids and PVC for cooler water service — often at lower cost. For large-bore or high-vibration lines, see the PVDF flanged ball valve; for big-diameter, space-saving isolation, the PVDF butterfly valve. Check your chemistry against our PVDF Chemical Resistance Guide, or ask our engineers via the Material Selection Service. View all PVDF valves.