Azbil Corporation
34
Model
KFPA
,
KFTA
- Field Mount type Pressure Indicating Controllers
6-3: Pilot relay
(1) To remove the pilot relay from the manifold, remove three fastening screws, lock
washers and the gasket attached to the manifold.
(2) Servicing the pilot relay
(a) Remove three fastening screw (1) and nuts (19).
(b) Remove parts (3) to (17) in the due order. Unless replacement is required, do
not remove parts (2) to (6)
(c) Clean metallic parts with an appropriate solvent such as petroleum naphtha or
chlorosene. Do not apply any solvent to the diaphragms. To let the solvent to
pregnate through the sheet surface, push valve system (2) in the direction of
compressing conical spring (5).
Figure 30 Pilot relay assembly
No.
parts name
Qty. No.
parts name
Qty.
1
Mounting screw
3
10 Seal
1
2
Valve stem
1
11 Diaphragm (lower)
1
3
Housing
1
12 Exhaust ring (out)
1
4
Guide pin
6
13 Exhaust ring (in)
1
5
Conical spring
1
14 Area plate
1
6
Pin washer
1
15 Pin washer
1
7
Spring
1
16 Diaphragm (upper)
1
8
Nozzle
1
17 Cover
1
9
Washer
1
19 Nut
3
19
4
4
1
2
3
5
6
7
8
9
10
11
12
13
14
15
16
17
