Burkert Type 8650 - Manual (Page 44)

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4.2.1. Versions
The variants differ according to station width, number of valve positions, connection pattern of the valves, configu-
ration of the service ports and optional use of check valves and / or P shut-offs.
Types.Pneumatic MP13
Station width 11 mm 16 mm
Valve types 6524 - Ex-i
6525 - Ex-i 6526 - Ex-i
6527 - Ex-i
Port configuration
(basic pneumatic module) Plug-and-socket connection Ø 4 mm
Plug-and-socket connection Ø 6 mm
Plug-and-socket connection Ø ¼“
Thread M5
Thread M7 Plug-and-socket connection Ø 8mm
( = 5/16“)
Thread G1/8“
Thread NPT 1/8“
check valves (optional) without check valve
check valve in R channel
check valve in R+S channel
P shut-off (optional) with P shut-off 1) not available
1) Only available for certain valve types and with functional limitations (see chapter Basic pneumatic modules with
integrated P shut-off)
4.2.2. Check Valve for Venting Ports
Because some applications require the use of a check valve, different versions are available:
• without a check valve
• check valve in R channel
• check valve in R+S channekl
4.2.3. Basic Pneumatic Modules with Integrated P Shut-off
General.description
For the basic pneumatic modules MP 13 in the version for valve types 6524 and 6525, a P shut-off integrated into
the module is available as an option. With this option, a valve to be replaced can be exchanged under pressure
without having to depressurize the complete valve island or system. During valve exchange the open cross-section
is reduced mechanically so much, that there is only slight residual leakage.
Features.and.limitations
The use of the P shut-off results in certain limitations with respect to the operating data of the complete system:
• The flow rate of the valves, Type 6524/6525, is reduced to approx. 60 %.
• For proper operation avoid back-pressures in the exhaust lines R and S (see chapter Installation / 10.2. Con-
nection of the Exhaust Air).
• The possible operating pressure range is between 5 and 7 bar.
• Since the pressure supply for the pilot valves is not shut off when using valves with external auxiliary control air,
the use of the P shut-off is possible only in conjunction with the valves internal control air in the limited pressure
range.
• The P shut-off can be combined with the integrated check valves.
Type 8650
english
Configuration and Function of the
Modules