H-Grip

• When a valve becomes seized or stuck through non usage there are usually only three main reasons.
• Sometimes the valve packing gland material can ‘bond’ with the valve spindle and so preventing it from being rotated.
• More commonly though, the ‘bonding’ is a result of a valve gate (this also applies to all other types of valve) being tightly driven into the valve seats and over a period of time the gate and seats effectively ‘become one’ making it impossible to extract the gate from the seats and open the valve.
• In a small number of cases usually associated with raw water, scale deposits can form within the valve housings preventing movement of the gate.
• H-Grip overcomes this by applying controlled torque pulses that gradually break the ‘bonding’ or scale deposits, freeing the valve so that it can be operated as originally intended.
• At all times the torque applied by H-Grip will never exceed the elastic limit of the material from which the spindle is made, thereby avoiding failure of the valve’s internal components.
• Also this application of torque impulses has minimal effect to the surrounding pipe work meaning there is no risk created by using this tool.

• The H-Grip tool also provides thrust feed back so that the operator can determine the direction of operation when this is unknown.

Using this same thrust feed back the operator can also determine whether the valve is open or closed.

‘Seized valves released using H-Grip’