18
17
19
16
58
83
35
53
58
9
34
35
58
53
A
31
66
77
31
13
66
154
77
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
(GB-IST-B935-0413) 19/24
12. Assembly of B935
10.
Insert the lower piston (53), the adjusting
sleeve (58) into the part assembling (35).
11.
Fit the part assembling (35), the lower piston (53)
and the adjusting sleeve (58) in the cylinder (9)
using the socket screw (34). Orient the part as-
sembling so that the tab with BARDIANI symbol
was aligned with the air connections.
8.
Insert the seal rings (16 and 19) and the guide
bushing (17) in the
stopper
(18).
9.
Insert the seal rings (83) in the adjusting
sleeve (58).
12.
Prepare the spring block putting gauge (154)
[only DN25--40, 65], the spring (31) and the
upper piston (66) and the nut (77) on the
central piston (13).
13.
Using a press with a plug specially made for the operation
(A) preload the upper piston (66). Screw the nut (77)
using a wrench specially made and mach the piston (66)
until the complete unloaded of the spring (31).
This operation must be carried out with great
care by a specialised person.
