Attività

Features and benefits
All basic design features of Velan small forged steel gate valves are adapted to special service conditions at cryogenic temperatures.
ADDITIONAL DESIGN FEATURES:
● Extended bonnets with sufficient gas column length, usually specified by customer, are supplied for all valves to keep stem packing at sufficient distance away from the cold fluid to remain functional.
● Solid CoCr alloy wedges on NPS 1⁄2 – 2 (DN 15–50) valves operate with no galling in cryogenic service.
● Cleaning: All cryogenic valves are thoroughly degreased and cleaned and pipe ends are sealed to prevent contamination.
Cryogenic Gate Valve 800Lb Standard Material Specifications
NO.Part NameAS to ASTMSS to ASTM
Type LF2Type LF3Type F304(L)Type F316(L)
1BodyA350 LF2A350 LF3A182 F304(L)A182 F316(L)
2Seat RingA276 420A276 410A276 304(L)A276 316(L)
3WedgeA350 LF2A350 LF3A182 F304(L)A182 F316(L)
4GasketCorrugated SS + graphiteSS + PTFE
5BonnetA350 LF2A350 LF3A182 F304(L)A182 F316(L)
6Bonnet BoltA193 B7A193 B7A193 B8A193 B8M
7StemA182 F6A182 F6A182 F304(L)A182 F316(L)
8Stem PackingFlexible GraphitePTFE
9PinA276 420A276 304
10Gland EyeboltA193 B7A193 B16A193 B8A193 B8M
11GlandA276 410A182 F304(L)A182 F316(L)
12Gland FlangeA105A182 F11A182 F304(L)A182 F316(L)
13Gland NutA194 2HA194 4A194 8A194 8M
14Yoke NutA276 420
15Bearing GasketA473 431
16NameplateSS
17H.W. Lock NutA194 2HA194 4A194 8A194 8M
18Hand wheelA197
Suitable Temperature 40 101 196
Note: Other materials are available upon request.
Dimensions (mm) and Weights (Kg)
NPS3/81/23/411-1/41-1/22
L7992111120120140178
H(OPEN)330333360407475475551
W100100125160160180200
WeightsBolted5.27.19.413.515.017.828.0
Welded4.86.48.712.213.415.226.0Forged Valves service