Alfa Laval Alfa Laval Air Actuated Valve 771L-10M-25-X-316L 771L-10M-25-X-316L

IMPORTANT: The TYPE 15/25 actuator does not have a red indicating cap like the type 10, 20 or 30 actuator. Cover the actuator stem threads with tape to protect the new bushing and packing from damage during assembly

Actuator spring is not contained

Hand pressure applied to the cylinder top restricting its travel

Actuator completely removed from the valve

Four bolts inserted into bonnet and clamped into vise

Air coupler adapter and nut removed by turning counterclockwise

Actuator cylinder removed from bonnet by applying a strap wrench to the cylinder and turn counter clockwise completely two times

Cylinder assembly pulled off the bonnet and spring removed

Diaphragm assembly separated from cylinder by holding cylinder and pulling on actuator stem

Inspect Valve Body Seat(s) for nicks and scratches and other signs of excessive wear

Inspect Valve Stem & Seat(s) rubber or PTFE seat(s) for signs of cracking, tearing, checking, or excessive wear

Inspect stem finish for galling, nicks, or scratches

Inspect Split Bushing for signs of cracks, nicks, scratches or excessive wear on inside diameter

Inspect O-ring(s) for cuts, abrasions, flat spots, or other damage

Upload photos of any damage found

Sign off on the valve inspection