Burkert Type 2101 - Manual (Page 14)

14
Start-up
Type 2101
8. sTarT-uP
8.1. safety instructions
Warning!
risk of injury from improper operation!
Improper operation may result in injuries as well as damage to the
device and the area around it.
• Before start-up, ensure that the operating personnel are familiar
with and completely understand the contents of the operating
instructions.
• Observe the safety instructions and intended use.
• Only adequately trained personnel may operate the equipment/
the device.
8.2. Pilot pressure
Warning!
for control function i – danger if pilot pressure fails!
For control function I control and resetting occur pneumatically. If
the pressure fails, no defined position is reached.
• To ensure a controlled restart, first pressurize the device with
pilot pressure, then switch on the medium.
→
Set the pilot pressure according to the type label specifications,
chapter “5” and flow (chapter “8.3”).
8.3. flow
CFA CFB/CFI
Flow below the seat
(closing against the medium) Flow above the seat
(closing with the medium)
CFA
Fig. 7: Flow below and above the seat
8.3.1. flow above the seat
Control function A, CFA: closes by spring force against the medium flow.
Control function B, CFB: closes with the control pressure against the
medium flow. The medium pressure supports the opening of the valve.
Warning!
risk of injury caused by the lines and device rupturing.
• Use valves with flow above the seat for gaseous media and
steam only.
To ensure complete opening, the minimum pilot pressure must
be used.
8.3.2. flow below the seat
Control function A, CFA: closes by spring force against the medium
flow. Control function B, CFB: closes with the control pressure
against the medium flow. The medium pressure supports the
opening of the valve.
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