Index revision : I - November 2018
7
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5.3. Control Air Circuit
The control solenoid valve must be 3-way to allow pneumovalve venting in idle mode. A dia.-
2.7 x 4 Rilsan hose must be used to connect the control solenoid valve to the
Mini
pneumovalve.
The 1/8 tapered x dia.-4 elbow union required for the
Mini
pneumovalve is always delivered
with the product. To reduce the response time of the assembly, place the control solenoid
valve as close as possible to the pneumovalve.
5.4. Product Circuit
5.4.1. 2-Way Mini Pneumovalve G
The product is supplied to the pneumovalve via a 1/8" BSP tapered union (not supplied with the
pneumovalve).
5.4.2. 2- or 3- Way Mini Pneumovalve RS
The product is supplied to the pneumovalve (and the return if fitted) via special SAMES unions.
Unless indicated otherwise, the pneumovalve is delivered with unions for dia. 6 x 8 Rilsan hoses.
Unions for dia. 4 x 6 Rilsan or dia. 4 x 16 and dia. 8 x 20 polyethilene hoses can be delivered as
options. For hoses of other diameters and materials, please contact our technical services.
6. Servicing
6.1. Maintenance
Maintenance is limited to changing the needle or gaskets if sealing is no longer efficient and a
seal cartridge for the isocyanate pneumovalves .
6.2. Disassembly
6.2.1. Disassembly of the pneumovalves all types excepted the pneumovalves isocyanate
1 Remove the pneumovalve from its base plate or manifold.
2 If necessary remove the control air and product hoses.
3 Remove the 2 screws counter-sunk into the metal on the APPLICATION side “
12
“.
4 Unscrew the needle
11
(or
16
).
5 The central part can then be separated. It contains the paint seal assembly comprising a
tapered seal
2
and two gaskets
3.
6 To remove the shaft
8
(or
14
):
• Remove the circlip at the other end of the pneumovalve.
• Remove the plug and piston spring
5
then the piston
6
and shaft.
• This is only necessary on exceptional occasions to reach the piston seal
7
and the air
seal assembly containing the air gasket
3
.