For strong acids (sulfuric, hydrochloric, hydrofluoric), alkalis, and organic solvents, a lined gate valve combines carbon steel strength with FEP (F46) fluoroplastic inertness. DN100 (4″) is common in chemical and pharmaceutical plants.The main gate valves product names of China gate Valve Network include:High Temperature & pressure Power Station Gate Valve,Inside Screw Non-rising Stem Wedge Gate Valve,Insulation Jacket Gate Valve,Lined Gate Valve,MZ44W Rising Stem Gas Quick Open&close ParallelMZ48W Manual Non-rising Stem City Gas Quick Gate Valve,Manual Knife-shaped Gate Valve,Manual Slurry ValveManual Wedge Copper Gate Valve

2026 Price Reference (USD, ex‑works)

Type                         Body  Lining  Actuation Price (USD)

Z41F46-16C Cast steel WCB FEP         Handwheel ~260

Z41F46-16P SS304 FEP                Handwheel        ~320

Z941F46-16C Cast steel WCB FEP             Electric    430–555

Electric actuator adds ~$200. Bulk orders get 10–15% discount. PFA lining (for higher temperature) costs more.

Key Selection Parameters

Lining: FEP (F46) resists nearly all chemicals except molten alkali metals, fluorine, and some aromatics. Max continuous temperature 120°C (150°C short term). For 200°C, use PFA.

Pressure: PN10 (1.0 MPa) or PN16 (1.6 MPa). Do not use above rating.

Body: Cast steel (WCB) is cost‑effective. Stainless steel body for highly pure or chloride‑rich media.

Seat: FEP/FEP or FEP/PTFE with resilient gate – provides bubble‑tight shut‑off.

Face‑to‑face length: per GB/T 12221, DN100 ~300 mm.

Flange standard: HG/T 20592 or GB/T 9113 (specify bolt circle).

Do you still need to know or purchase the following gate valve products:

Installation & Maintenance

Never use for throttling – high‑velocity flow erodes the lining.

Avoid temperatures >150°C long term; lining softens and leaks.

Protect lining from scratches – even a small cut ruins chemical resistance.

Flange bolts: tighten evenly and crosswise to avoid crushing the liner.

Cycle valve every 6 months to prevent sticking.

Bottom Line

A DN100 FEP‑lined gate valve costs $260–555 in 2026. Respect temperature limits, avoid throttling, and keep lining intact – it will serve reliably in highly corrosive services for years.

Do you still need to know or purchase the following gate valve products: