Means to prevent accidental or unauthorised actuation
35
/
02
•
to be locked or disconnected by means of a push or pull
35
/
04
•
yieldingly resisting the actuation
35
/
06
•
using a removable actuating or locking member, e.g. a key (F 16 K 35/10, F 16 K 35/12 take precedence)
35
/
08
•
requiring setting according to a code, e.g. permutation locks
35
/
10
•
with locking caps or locking bars
35
/
12
•
with sealing wire
35
/
14
•
interlocking two or more valves
35
/
16
•
with locking member actuated by magnet
37
/
00
Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
39
/
00
Devices for relieving the pressure on the sealing faces
39
/
02
•
for lift valves
39
/
04
•
for sliding valves
39
/
06
•
for taps or cocks
41
/
00
Spindle sealings
41
/
02
•
with stuffing-box
41
/
04
•
•
with at least one ring of rubber or like material between spindle and housing
41
/
06
•
•
with at least one ring attached to both spindle and housing
41
/
08
•
•
with at least one ring provided with axially-protruding peripheral closing-lip
41
/
10
•
with diaphragm, e.g. shaped as bellows or tube
41
/
12
•
•
with approximately flat diaphragm
41
/
14
•
with conical flange on the spindle which co-operates with a conical surface in the housing
41
/
16
•
with a flange on the spindle which rests on a sealing ring
41
/
18
•
•
sealing only when the closure member is in the opened position
43
/
00
Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
47
/
00
Means in valves for absorbing fluid energy (for pipes F 16 L 55/00)
47
/
02
•
for preventing water-hammer or noise
47
/
04
•
for decreasing pressure, the throttle being incorporated in the closure member
47
/
06
•
•
with a throttle in the form of a helical channel
47
/
08
•
for decreasing pressure and having a throttling member separate from the closure member
47
/
10
•
•
in which the medium in one direction must flow through the throttling channel, and in the other direction may flow through a much wider channel parallel to the throttling channel
47
/
12
•
•
the throttling channel being of helical form
47
/
14
•
•
the throttling member being a perforated membrane
47
/
16
•
•
the throttling member being a cone
49
/
00
Means in or on valves for heating or cooling (for pipes F 16 L 53/00; thermal insulation in connection with pipes or pipe systems F 16 L 59/16)
51
/
00
Other details not peculiar to particular types of valves or cut-off apparatus
51
/
02
•
specially adapted for high-vacuum installations [2]
