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10. Drain valve
10.1 Construction
AV100
• Male thread G½ on input side
• Output side with cutting ring
connection ø12 as per
DIN 2353 – DS12
(1) Valve housing
(2) Sealing ring
(3) Seat
(4) Valve spindle with cone
(5) Stuffing box
(6) Gland packing
10.2 Assembly
Ensure that drain piping has free outlet to atmosphere and is protected
from pressure peaks.
Firmly screw on drain valve with sealing ring (2) on existing unit.
•
•
Assemble drain piping (tube ø 12x1, material St 35.8) on provided pipe union
(14) as per DIN 2353 (on the part of the builder).
10.3 Commissioning
Rust, sand or similar impurities inside of the medium or during first flushing can
cause leakage if they remain in the area of the seat.
Purging of valve:
Fully open valve for purging. The pre-pressed gland packing can lose its
•
denseness due to a longer storage (see chapter 10.4).
close valve
•
16
(7)
Screw cap
(8)
Sealing ring
(9)
Upper part of valve
(10) Handwheel
(11) Cap nut
(12) Cutting ring connection
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