Liquid ammonia pull off valve - liquid ammonia loading arm pull off valve - liquid ammonia unloading loading arm pull off valve
Alternative name: emergency release pull off valve anti pull emergency release pull off valve fluid loading arm pull off valve
Model: GHLDF-16P GHLDF-25P GHLDF-40P
Overview of pull off valve:
Snap valve is mainly composed of two shut-off valves (shell, deflector, spring, male valve disc, main seal, main seal seat, screw, break bolt, gasket, nut, retaining pin, secondary seal, female valve disc). The main body of the shut-off valve is a one-way valve closed by spring force. Its breaking force comes from the breaking bolt of the equipment itself, without external force such as electricity and liquid. The shell is made of austenitic stainless steel 0Cr18Ni9 (SUS304), the sealing material is low temperature resistant polytetrafluoroethylene, lined with elastic stainless steel skeleton, and the sealing surface is grinded to meet the sealing requirements.
Use of liquid ammonia pull off valve:
Liquid ammonia snap valve is designed to be installed on the loading/unloading hose or arm of the tank car (train, car) or loading/unloading arm of chemical raw materials (such as oil products, liquid propane, ammonia, ethylene oxide, liquefied petroleum gas LPG, butadiene, industrial methanol, natural gas LNG, and loading/unloading crane pipe equipment, so as to prevent from being connected with the hose (or equipment) due to misoperation or sliding When they are separated, they drive away from the work area, and pull off the connecting pipe, which causes a large amount of raw materials to leak out, leading to safety accidents; Or the tank car is being loaded and unloaded. If the tank car needs to leave the site quickly due to sudden fire and other reasons, the tank car and the loading arm cannot be separated by normal methods, resulting in economic losses and environmental pollution.
Function of liquid ammonia unloading crane pipe pull off valve:
In order to prevent accidents and reduce accident losses, the loading and unloading equipment is equipped with emergency release pull off valve, which is a major measure to ensure safety and environmental protection during the storage and transportation of raw materials. Under normal working conditions, when under a certain tension, the pull off valve of the fluid loading arm will automatically and safely disconnect, and both ends will automatically close without fluid leakage, so as to protect the pipeline and equipment.
Basic features of liquid ammonia crane pipe pull off valve:
1. Enable the equipment to disengage automatically and quickly;
2. The two parts can be effectively sealed after separation;
3. The breaking force is stable, easy to repair, requires manual reset and can be broken repeatedly;
4. The breaking force comes from the mechanical part itself, without external force such as electricity and fluid;
5. Connection mode: flange and internal thread, welding.
Performance parameters of pull off valve of liquid ammonia loading arm:
1. Nominal diameter: DN25, 32, 40, 50, 65, 80, 100;
2. Nominal pressure: PN0.6, 1.0, 1.6, 2.5, 4.0MPa;
Working principle of liquid ammonia crane pipe pull off valve:
When the tank car is loaded and unloaded normally, the hose is in a loose and free state; When the tank car is disengaged and its interface enters the warning area, the hose is tensioned and gradually extended. When it exceeds the limit, it enters the breaking area, and the breaking bolt of the emergency breaking valve breaks instantly, realizing the separation of the device; After separation, one check valve is left on the pipeline of the oil station, and the other is left on the hose to realize sealing under the action of the internal spring force. Note: after emergency pull off, the pump must be stopped quickly to remove the pipeline pressure; Do not squeeze the valve clack with external force before the pipeline is emptied, otherwise it will cause medium leakage and cause safety accidents, Pull off valve Before recovery, check whether the main seal and auxiliary seal are damaged. If damaged, remove the main seal seat to replace the main seal; Otherwise, only replace the breaking bolt. When resuming the operation, insert the guide part of the male disc trunnion into the guide hole of the female disc, manually press and open the check valve, align the lug seats of the break bolts on the two valve housings, put on new break bolts and tighten the nuts to complete the recovery work.
