The surficial collection strips are included in a SGCS design for the purpose of creating gas collection conveyance channels below the membrane.
The amount of and placement of the strips is based upon design parameters associated with a sites specific gas modeling for gas generation rates.
Pressure Relief Valve (PRV)
The patented PRV is a safety valve that is designed to work with the ClosureTurf system. The PRV is designed to protect the membrane component from gas buildup (ballooning) during a malfunction of the primary gas collection system by venting gas to the atmosphere. The valve is a dual purpose valve in that it opens to allow gas (pressure) to escape when needed and seals (under vacuum) to prevent air intrusion into the collection system. The PRV was designed to meet the CT systems requirements for an extremely low pressure release/seal with a high flow capacity.
The Isolation is also a safety valve. The valve is designed to perform as a one way check valve to prevent a backflow of gas into the ClosureTurf system through the header pipe from adjacent non-ClosureTurf areas during malfunction periods of the primary gas collection system. The isolation valve can be placed at the collection wellhead or header system.
Surficial Collection Base
The Surficial Gas Collection Base is designed to be the point of interface between the membrane, underlying collection strips, auto isolation valve and a collection wellhead.
The base provides high gas flow capacity, low profile and a stabile base for the isolation valves and wellhead components.