OPERATING MANUAL
11-2020
3/8
1.
INTENDED USE
Gate valves with soft seals are intended for isolation of NG (natural gas) flow. The valves have the Oil & Gas
National Technical Assessment no. Nr – INiG-PIB-KOT-2019/007. Each valve can be installed in above-ground
and underground pipelines as an integral inline part of the piping.The gate valves are two-position valves which
can only be set fully open or fully closed, and not intended for operation as control or damper valves.
2.
TECHNICAL DESCRIPTION
Production and acceptance according to PN-EN 13774:2013-07
100% of each valve is leak tested.
Application temperature range: -10
°
C to +70
°
C from -20
°
C (-30
°
C) to +60
°
C, i.e. the Temperature Class 2
(Class 3)
Nominal diameter range:
for P/N 2312 - DN25 to DN600 [mm].
for P/N 2314 – DN50 to DN600 [mm].
Hydraulic performance: maximum medium flow rate for liquids 4 [m/s] and 30 [m/s] for gases.
Valve switching driving torque:
DN
[mm]
Ilo
ść
obrotów
M
max
[Nm]
25
20
20
32
40
11
25
50
13,5
65
14
50
80
17
100
21
60
125
26
96
150
26
200
34,5
108
250
42,5
200
300
51
Valve control mode: the standard version of the gate valve has the clockwise closing sense of rotation. The
closing sense of rotation can be opposite on special order
.
Installation length: in accordance with plant documentation.
Nominal pressure ratings: 1,0MPa, 1,6MPa
The flanged gate valves with soft seals intended for gas flow isolation in NG pieline systems and other fluid
systems, feature a smooth walled bore, a non-ring spindle, and an o-ring spindle seal installed in a head-type
valve cover. The spindle is guided by a bushing in the valve cover neck and a sealing plug. The spindle seal
is effected by the plug sealing assembly, which is a system of O-rings. The gate valve closure is a cast iron
wedge completely coated with rubber and featuring sliding inserts as motion bearings. The spindle can be
operated manually with a hand wheel or, in gate valves installed underground, through a hood and gate valve
casing, using a T-socket wrench. The valve body 2312 features bell socket ends with transverse grooves cut
along the outer surface on which PE pipe ends are slid over. The pipes at the grooved bell socket length are
press fit with pressed steel rings that provide sure and tight joint. The metal to PE joints are preserved with
the PROTEGOL anti-corrosive protective coat and heat-shrunk bands.
