GEKO corrosion-resistant rotary valves, plug valves and triple-eccentric butterfly valves

Brand Positioning and Background

GEKO Valves

· Founded: 1956, Germany

· Specialty: High-corrosion, high-reliability rotary valves

· Core Focus: Zero leakage, low emission, high safety

· Product Range: Plug valves, high-performance butterfly valves, fluorine-lined valves

· Typical Industries: Chemical, refining, alkylation, acids & bases, slurries, fine chemicals

· Key Advantages: Self-wiping, lubrication-free, online repairable, fire-safe  

Key Product Series

a) Plug Valves (Sleeve Valves)

• Sleeveline Non-lubricated Plug Valve
• Structure: Tapered plug + PFA/PTFE sleeve, self-wiping 
• Features: Zero leakage, lubrication-free, adjustable and repairable online 
• Sealing: PFA/PTFE sleeve, bi-directional 
• Applications: Strong acids, strong bases, chemical processing, alkylation units 
• Maintenance: Sleeve replacement without grinding 

Fully Lined PFA Plug Valve

• Structure: Full PFA-lined body and plug 
• Applications: Extreme corrosion, halogens, oxidizers, high-purity conditions 
• Features: Metal fully isolated, zero corrosion, no deposits 

High-Performance Plug Valve

• Structure: PFA-encapsulated tapered seat 
• Temperature Range: -40°C to 274°C 
• Advantages: High wear resistance, longer lifespan, simplified maintenance 

b) High-Performance Butterfly Valves

Triple-Eccentric Metal Seated Butterfly Valve

• Structure: Triple eccentric, metal laminated seal 
• Pressure Class: Class 150/300/600, PN16–PN100 
• Sealing: ISO 5208 Rate A zero leakage, API 607 fire-safe 
• Applications: High temperature, oil & gas, steam, gas, process loops 
• Features: Frictionless operation, tighter when closing, long service life 

Double-Eccentric Butterfly Valve

• Applications: Medium-high pressure, bi-directional sealing, low torque 
• Benefits: Replaces gate/stop valves, compact and lightweight 

Fluorine-Lined Butterfly Valve

• Fully PFA/PTFE lined, corrosion-resistant 

Core Technologies

• Sleeveline Sleeve Sealing: PFA/PTFE sleeve, self-wiping, zero leakage, online adjustable 
• Reverse Lip Stem Seal: PFA reverse lip + spring preload, dynamic & static dual seal, ISO 15848 low emission 
• Fire-Safe Design: API 607 certified, seals under high temperature 
• Online Maintenance: Replace sleeve, seal, or bearings without valve removal 

Materials and Seals

Typical Applications & Models

• Acid/alkali chemical → Plug Valve 
• Extreme corrosion/fluorine requirement → Fully Lined PFA Plug Valve 
• Refining/alkylation → Specialized Plug Valve 
• High-temperature gas, fire-safe, zero leakage → Triple-Eccentric Butterfly Valve 
• Slurry, wastewater, particulates → Fluorine-Lined Butterfly Valve 

GEKO Valve Maintenance Process

1.Disassembly: Remove actuator → bonnet → plug/disc → sleeve/seal 

2.Replacement Parts (Full Overhaul): PFA/PTFE sleeve, stem seal, bearings, O-rings, actuator maintenance 

3.Assembly: Align plug/disc, pre-tighten seal evenly, follow torque standards, smooth full-stroke operation 

4.Pressure Test: Body 1.5× nominal pressure, Seal 1.1×, hold ≥5 min, zero leakage, test certificate required 

 GEKO Valves vs. Standard Valves

Summary

Focus on Sleeve, Seal, Alignment

• Plug Valve: Replace sleeve & seal, align plug 
• Butterfly Valve: Triple-eccentric focus on seal, concentric on lining 
• All valves: Pressure test twice, certificates issued 
• Extreme corrosion: Use genuine PFA/PTFE, no substitutes 

GEKO specializes in corrosion-resistant rotary valves, mainly plug and triple-eccentric butterfly valves, featuring zero leakage, self-wiping, online repairable, and low emission—ideal for chemical, refining, acid/alkali operations. Maintenance focuses on sleeve/seal replacement, precise alignment, and strict pressure testing.