BUTTERFLY VALVES METAL TO METAL SEAL :: ACCESSORIES Stellited seat Upon request of the customer it is possible to cover the valves seat with Stellite in order to grant wider possibilities of application of the valve and to reduce the maintenance necessity. Heating system The heating system of our METAL POWER valves can be realised as follows: 1) through a heating external jacket (connections and materials to be defined with the customer) that will     allows a continuous temperature maintenance of the process; 2) through the holes on the shaft that allows the heating of the shaft, the disc and the seal ring. Both heating systems (that can also be mixed) avoid the coagulation of more viscous fluids at low temperatures. Shaft lubricating systems A greaser placed on the upper end of the valve (near the stem bearings) allows the shaft lubrication. TA-LUFT Our METAL POWER range can be equipped with system to avoid emissions in the atmosphere. This insulating system called "TA-LUFT" can be supplied upon simple request of the customer. The above described result is obtained through the change of the packing ring. The valves can be equipped with Garlock EVSP 9000 gasket to avoid leakage during the helium proofs. Live-loading A careful shaft manufacturing, the insertion of special bearings for the shaft centering and the use of compression springs are the requirements to obtain a live-loading performance. This performance reduces the packing ring maintenance necessities. Standard angular dial indicators The insertion of a graduated indicator (placed on the actuator) permits to verify the opening angle of the valve. Disc edge protector A V-shaped bar placed near the disc opening allows a better fluid streamline and a protection of the upstream. This protection can be installed only on valve designed in respect of ASME B 16.10 or using connection pipes. Connection pipes Connection pipes can be supplied upon simple request of the customer.