01
Reduced Plot Footprint
No separate gas-holder foundation zone is required, which makes the format suitable for retrofits and compact anaerobic layouts.
Tank-Top Double Membrane Gas Holder
Tank-Top Double Membrane Gas Holder
A tank-top double membrane gas holder for digesters, reactors, and integrated roof-mounted storage applications.
Product Overview
Integrated storage where footprint is limited
A tank-top double membrane gas holder for digesters, reactors, and integrated roof-mounted storage applications.
Its value lies in tighter system integration, a smaller plot requirement, and shorter gas routes while retaining mature double-membrane pressure and safety logic.
Core Advantages
Advantages for industrial project delivery
Built around stable operation, efficient installation, and lower long-term maintenance risk for industrial projects.
02
Shorter Gas Path
The gas path from digestion to storage is shorter, helping reduce pressure loss and condensation risk.
03
Higher System Integration
It allows storage, level devices, mixing interfaces, and safety components to be coordinated within one platform.
04
Shorter Installation Schedule
Membrane assemblies and connection nodes can be prefabricated, leaving only deployment, fixing, and commissioning for the site team.
Technical Specifications
Key specifications and operating boundaries
| Typical Volume Range | 500-12,000 m3 |
| Working Pressure | 800-3,000 Pa |
| Installation | 固定于罐顶或刚性盖板 |
| Compatible Tanks | 厌氧消化罐、污泥消化罐、反应罐 |
| Service Life | 15 years and above |
Safety Design
Three-level safety protection
Level 1 Protection
Roof-mounted relief valves quickly release abnormal pressure and protect both membrane and roof structure.
Level 2 Protection
Pressure, level, and blower status are monitored together, enabling automatic interlocks under abnormal conditions.
Level 3 Protection
Hard interlocks with the flare, gas-utilization equipment, and header valves keep the system controlled during shutdowns.
Structural Design
Dual-channel design
The dual-channel design evens out internal outer-membrane pressure and improves circumferential shape control on large-diameter tank roofs.
Material Standards
Material standards and product features
Flanges and clamping details are optimized for roof-mounted connections.
Membrane seams and edge terminations balance gas-tightness with maintainability.
The membrane combination can be tuned to tank diameter and operating pressure.
Main Structure
Main Material Structure
| Inner Membrane | PVDF-coated polyester membrane, 1.0-1.2 mm |
| Outer Membrane | UV-resistant outer membrane, 0.8-1.1 mm |
| Roof Connection | Customized flange ring with continuous clamping profile |
| Seal Components | EPDM sealing strip with corrosion-resistant fasteners |
Membrane Performance
Methane permeability and membrane specifications
| Membrane System | PVDF inner membrane + UV-resistant outer membrane |
| Methane Permeability | < 30 cm3/(m2·day·atm) at 23°C |
| Tensile Strength | >= 5,000 N / 5 cm |
| Temperature Range | -40°C to +70°C |
| Welding Method | Automatic hot-wedge welding |
| Service Life | >= 15 years |
Project Inquiry
If you already have process data, we can move straight into proposal and quotation
Send the capacity, site conditions, and preferred finish or structure, and we will prepare a project-specific recommendation.
Request a Quote