Name: PTFE‑Lined Lubricated Plug Valve | Double Sealed Industrial Plug Valve
Availability: InStock

PTFE‑Lined Lubricated Plug Valve | Double Sealed Industrial Plug Valve

Size Range

NPS 1/2" to 24" (DN15 to DN600), 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

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

Maximum Allowable Working Pressure

ASME Class 150 & 300, PN16, PN25, PN40

Seats & Seals

RPTFE, TFM1600, Tek-Fil®, PEEK, UHMWPE, Metal-to-Metal

Plug Material

ASTM A351 Gr. CF8M, optional hardfaced/coated (ENP, Stellite®, Cr-Carbide)

Shutoff Rating

Class VI, bubble-tight shutoff optional

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

Design Standards

ASME B16.34, API 608, MSS-SP-72

End Connection Standards

Flanged: ASME B16.5 (RF/RTJ), DIN EN1092 PN16/25/40

Testing & Inspection

API 598, ISO 5208 Pressure & Leakage Test

Optional NDT: Radiography, Ultrasonic, Magnetic Particle

Face-to-Face Dimensions

ASME B16.10, ISO 5752

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

Technical Specifications

- Size Range: 1/2"‑24"

- Liner Material: Virgin PTFE / Graphite‑filled PTFE

- Body: Carbon‑steel, Stainless‑steel and alloy material options

- Operation: Manual lever, gear‑operated, pneumatic or electric‑automated actuation

- External‑leakage‑control levels can be custom‑specified upon request

Core Design Principle

Large‑perimeter PTFE (Polytetrafluoroethylene) liner forms the primary sealing

surface, delivering far superior sealing performance than standard ball or gate valves.

The low‑friction property of the PTFE liner provides built‑in self‑lubrication.

The plug can be operated smoothly even after staying fully open or closed for

extended periods.

Two‑independent sealing systems are adopted to provide double protection

against external leakage. The secondary PTFE ring creates an extra‑level

stem‑seal safeguard, ideal for harsh thermal‑cycling working conditions.

Dynamic spring washers maintain constant, stable compression force on packing

seals to compensate for thermal expansion‑contraction changes during repeated

heat‑cycle service. Optional injection‑monitoring ports are available on the

top‑primary outer‑seal.

Advantages：

- Reduce Unplanned Downtime: Replacing ball valves and gate valves with GEKO lined plug‑valves significantly cuts production‑loss and maintenance expenses.

- Simple Field Adjustment: Long‑term sealing performance can be quickly restored by adjusting the top‑mounted bolting, without full valve disassembly.

- Dual‑Stem Leakage Protection: Double independent sealing layers effectively prevent process‑media escape to atmosphere.

Cage-Type Plug Valve with PTFE Sleeve Protection

- Low‑Friction Self‑Lubricated Liner: Smooth plug rotation after long idle‑time,

no‑sticking risk for infrequently operated loops.

- Cost‑Efficient Long‑Life Performance: Balanced purchase cost and extended

service cycles, delivering outstanding long‑term economic benefits.

Available Variants & Options

- Standard PTFE‑lined on‑off plug valve

- Severe‑service thermal‑cycling plug‑valve with patented retractable sealing gasket

- Gravity‑sampling plug‑valve for bulk‑solid and liquid sampling systems

- Class 600 high‑pressure lined plug‑valve, multi‑port configurations on request

Chemical & Corrosive‑Media Industry
Controls isolation and sampling of acid, brine, phosphoric‑acid slurry, green liquor and other corrosive fluids inside process pipelines and storage tanks.

Operating Conditions:PTFE‑lined corrosion‑resistant sealing, long‑term static standby service, low‑friction smooth operation after long idle‑time, anti‑leakage protection for hazardous media.
Thermal‑Cycling Heat‑Process System
Serves high‑temperature circulating pipelines requiring reliable sealing under repeated heating‑and‑cooling cycles.

Operating Conditions:Dual independent stem‑seal protection, spring‑loaded packing to compensate thermal expansion‑contraction, zero‑external‑leakage safety requirement.
Gravity Sampling & Catalyst Injection
Mounted under silos, hoppers and reaction vessels for gravity sampling, batch dosing and catalyst injection.

Operating Conditions:Infrequent‑operation duty, 180° rotary sampling workflow, manual or automated actuation, stable sealing for long standby periods.
Pulp & Paper Production
Regulates lime slurry, untreated river‑water, green‑liquor and waste‑slurry flow in pulp‑making piping loops.

Operating Conditions:Abrasive‑slurry resistant liner, large‑perimeter sealing surface, adjustable top bolting for quick‑on‑site seal maintenance without valve removal.
Wastewater & Sludge‑Treatment Plant
On‑off isolation for waste sludge, lime‑milk and corrosive wastewater inside sewage‑treatment pipelines.

Operating Conditions:Anti‑erosion PTFE liner, resistant to suspended‑solid particles, long‑life performance to cut unplanned shutdown & maintenance cost.
Mining & Mineral‑Processing Industry
Handles zinc‑bearing sulfuric‑acid, mineral slurry and aggressive mineral‑processing fluids across mining circuit piping.

Operating Conditions:Heavy‑duty corrosion‑resistant liner, alternative replacement solution for ball valve & gate valve, low total‑cost long‑term operation.

ETIQUETAS CALIENTES :

Thermal Cycling Resistant Plug Valve

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