As a shut-off valve, the HV with on/off plug is preferably used where a ball or butterfly valve, for example, cannot be deployed owing to the requirement for hermetic tightness: In conjunction with the standard safety stuffing box, the valve complies with the German Clean Air Code (“TA Luft”).
Equipped with an equal percentage or linear control plug, the HVR can perform a genuine control function. The body, seat and bellows can be replaced and varied independently, permitting optimum adaptation to the operating conditions in question and low-cost maintenance.
