Product Catalog

Fluoropolymer-Lined Pneumatic Single-Seat Control Valve (ZJHPF46)

Industrial valves and fittings dispatch fast — wear parts and complete machines quoted on request.

Lined Valves

Fluoropolymer- and rubber-lined valves for acid, alkali and corrosive service — gate, globe, butterfly, diaphragm, check and Y-strainer, DN15 to DN1200 at PN0.6–1.6 MPa. The lining is the working surface: it suits corrosive media but not abrasive slurry, and it is the part that fails if the valve is throttled or run dry. Lining grade (PTFE, FEP or PFA) and body material are confirmed per order.

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Lined pneumatic diaphragm single-seat control valve: a multi-spring diaphragm actuator drives a contoured plug whose bore, plug and seat are all wrapped in FEP (F46), PTFE or PFA, so the corrosive medium never touches the cast body. Built for the case where a metal control valve would need Hastelloy or titanium to survive. Sizes DN15 to DN300 at PN1.0 and PN1.6 MPa, designed to GB12235 with GB4216 flanges. Temperature follows the lining: ≤85 °C on rubber, ≤100–120 °C on fluoropolymer — above that the lining creeps and the seat loses its shape, so keep high-temperature duty on an all-metal valve.

General Specifications

Size RangeDN15 – DN300
Pressure RatingPN1.0 / PN1.6 MPa
TypePneumatic diaphragm single-seat control valve
ActuatorMulti-spring diaphragm, stroke 16 / 25 / 40 / 60 mm
Spring Range20–100 · 40–200 · 80–240 · 20–60 · 60–100 kPa
Mediaacid / alkali / chemical

Materials & Coating

BodyQT400 / WCB / CF8 / CF8M / CF3 / CF3M
LiningFEP (F46) standard; PTFE (F4) or PFA on request
TrimWCB with FEP lining on plug and seat
Temperature≤85 °C rubber · ≤100 / 120 °C fluoropolymer
StandardsGB12235 · GB12221 · GB4216 · GB/T13927

Applications

Acid and alkali flow control Chemical dosing loops pH control in effluent treatment Corrosive process control where Hastelloy is too expensive

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