Name: Upper-type cryogenic ball valve
Brand: ldfm

Product Overview
Lianda has developed overmounted ultra-low-temperature ball valves to meet the rapid development of liquefied natural gas and other low-temperature industries. All Lianda 1 ultra-low temperature ball valves were designed and tested in accordance with BS6364 and Shell MESC SPE77 / 306.
Applicable Condition
1. LNG 2. ethylene unit
Product Characteristics
1 low temperature resistance

2 Reliable sealing

3 Low switching torque

4 fire-protection design

5 Available for online repair

Structural Characteristics	Instructions
Top-mounted design	after the pipeline system is reduced, it can be checked and repaired online to simplify the maintenance.
Dripping plate design	welding a dripping plate on the packing letter, this can prevent condensate into the cooling layer, avoid or reduce the corrosion of the cooling layer, improve the service life of the cooling layer, and packing function after welding the drip plate, will make the packing function and air natural convection heat exchange area greatly increased, reduce the cooling volume of packing.
Long neck bonnet design	The design of the long neck valve cover avoids the failure of the valve stem because the condensate water freezes in the packing, resulting in sealing failure.
Stem seal	valve stem with low leakage packing (through API 622 certification), panplug seal, reseal, more reliable seal.
Packing loading and sealing	the packing place adopts the disc spring loading design, and the long-term sealing is more reliable.
Double group thrust pad design	it can reduce the valve torque, prevent the valve from sticking or crawling after using for a long time, and prolong the service life of the valve.

Product