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Пробковые клапаны Пробковый клапанCage‑Sleeved Plug Valve | PTFE Lined Corrosion‑Resistant Plug Valve Metal‑to‑Metal Throttling
GEKO cage‑sleeved plug valve features PTFE liner protection, metal‑to‑metal throttling design, ideal for slurry, brine, phosphoric acid and other corrosive high‑velocity fluid services. Sizes 1‑16 inch, carbon steel / stainless‑steel body available.
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Cage‑Sleeve Protected Plug Valve, PTFE Lined, Metal‑to‑Metal Throttling‑ GEKO Valve
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Size Range NPS 1/2" to 12" (DN15 to DN300), larger sizes up to DN600 available upon request |
Body Material Options Carbon Steel (WCB), Stainless Steel (CF8, CF8M, CF3, CF3M), Duplex Stainless Steel (4A/5A), Alloy 20, Hastelloy®, Monel®, Inconel®, Titanium |
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Temperature Range -50°F to +650°F (-46°C to +343°C), extended ranges available with special alloys |
Stem / Shaft Material ASTM A479 Gr. 316, optional 17-4PH, Duplex SS, low-friction coating available |
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Maximum Allowable Working Pressure ASME Class 150 & 300, PN16, PN25, PN40 |
Seats & Seals RPTFE, TFM1600, Tek-Fil®, PEEK, UHMWPE, Metal-to-Metal |
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Plug Material ASTM A351 Gr. CF8M, optional hardfaced/coated (ENP, Stellite®, Cr-Carbide) |
Shutoff Rating Class VI, bubble-tight shutoff optional |
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Operation Method Lever, Gear Operator, Pneumatic Actuator, Electric Actuator, ISO 5211 platform |
Body Style & Ports 2-Way (Straight), 3-Way (L- or T-pattern), Full Bore or Reduced Bore |
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Design Standards ASME B16.34, API 608, MSS-SP-72 |
End Connection Standards Flanged: ASME B16.5 (RF/RTJ), DIN EN1092 PN16/25/40 |
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Testing & Inspection API 598, ISO 5208 Pressure & Leakage Test Optional NDT: Radiography, Ultrasonic, Magnetic Particle |
Face-to-Face Dimensions ASME B16.10, ISO 5752
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Special Design Features Bi-directional sealing, low operating torque, multiple seat options, full-bore flow, modular actuation, corrosion & wear resistance, long service life |
Applications Oil & Gas pipelines, Petrochemical processing, Fuel handling systems, Municipal water & wastewater, Chemical plants, Power generation |

- Size Range: 1‑16 Inch
- Body Material: Carbon Steel / Stainless Steel or Others
- Plug & Cage Material: CD4‑MCU
- Sealing Component: PTFE Liner
GEKO Cage‑Sleeved Plug Valve is a specially‑engineered lined plug valve
built to deliver reliable throttling and bubble‑tight shut‑off performance
under corrosive, high‑velocity and slurry‑laden operating conditions. Equipped
with a protective metal cage sleeve installed on the plug, this unique design
shields the PTFE liner against severe erosion while the valve is throttling
under high‑pressure‑drop service.

Design Principle
The metal cage sleeve is securely fastened onto the plug, locked in‑place
with a pin welded to the bottom of valve body. Bearings fitted on the cage
maintain a controlled clearance between cage and plug, enabling smooth,
free rotation of the plug during operation. During throttling, sealing occurs
metal‑to‑metal between cage and body; while positive shut‑off provides
metal‑to‑PTFE liner sealing. The cage physically covers and protects the PTFE
liner from direct impact and erosion caused by fast‑moving process fluids.
Unique design of Cage‑Sleeve Protected Plug Valve


Excellent Corrosion Resistance — PTFE‑lined sealing assembly handles a wide range of aggressive chemical media.
Durable Slurry Service — Optimised for abrasive‑containing process fluids with suspended solids.
GEKO Cage-Type Plug Valve with PTFE Sleeve Protection Application