Burkert Type 2100 - Manual (Page 14)

14
Start-up
8.3. Flow direction
CFA/CFI CFB/CFI
Flow direction below the seat
(closing against the medium) Flow direction above the seat
(closing with the medium)
CFA
Fig. 7: Flow direction below and above the seat
8.3.1. Flow direction 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 direction above the seat for gaseous media
and steam only.
To ensure complete opening, the minimum pilot pressure
must be used.
8.3.2. Flow direction 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.
WARNING!
Seat leaks caused by the minimum pilot pressure being too
low (on CFB and CFI) or the medium pressure being too high!
• Observe the minimum control pressure and medium pressure
(see “6.4.2. Pressure ranges”).
9. MAINTENANCE WORK
→
Complete a visual inspection of the equipment once a year. Shorter
maintenance intervals may be recommended depending on the
operating conditions.
9.1. Replacement parts
CAUTION!
Risk of injury and/or damage by the use of incorrect parts!
Incorrect accessories and unsuitable replacement parts may
cause injuries and damage the device and the surrounding area.
• Use only original accessories and original replacement parts
from Bürkert.
Wearing parts: Seals and the swivel plate
→
In the event of a leak, replace the relevant wear part.
The maintenance and repair instructions are available on the
Internet:
www.burkert.com
english
Type 2100