H-Seal

 

• Where gas/pneumatic valves are required to be sealed tightly, problems occur where a positive seal results in a passing valve
• Using the H-Tap Tool, sealant with a high viscosity can be introduced into a valve so that as the valve is operated the sealing faces are coated, creating the required seal.
• The viscosity of the sealant means that the sealant does not travel down the system causing problems in other components.
• The quality of the sealant means that it will not harden over time.
• This system of sealing passing valves is patented and the National Grid – Gas, approved, best practice to deal with passing valves (Low and Medium Pressure, Procedure No. T/PR/V/16).
• This system is also used as a preventative maintenance facility, used where guaranteeing a valve will not pass, is deemed vital to the operation of the network.