Cryomech-LHeP 实验室液氦机液氦发生器多系统氦液化器
美国Cryomech公司专业生产LHeP 实验室液氦机，液氦产品：每天12升或18升，气源为99.8%以上纯度的钢瓶氦气。
冷头：4K脉冲管制冷头
杜瓦系统：液氦液面控制器和液氦输出管

Cryomech-LHeP系统氦液化器主要特征： 1、采用PT415型脉冲管制冷机作为He液化器的核心。 2、集成液面监控，100％液面时自动停机。 3、集成温度计监视压缩机工作温度 4、全自动运行，无需专操作人员。 5、维电脑控制的压缩机系统。 6、安装简单，维护周期长，费用低。 7、可以对系统进行远程控制和监视。

Cryomech-LHeP系统氦液化器技术参数： 液化速度 （从室温氦气）:    12、20 升/天 杜瓦容积:                150 升 液氦杜瓦和冷头的重量:     150千克 杜瓦尺寸：                直径72厘米                          高度183厘米 压缩机型号:               CP1010 （仅适用于水冷） 压缩机重量:               214千克 压缩机尺寸:               61×58×91厘米 输入功率:                 10.5KW 冷却水:                   zui小流量11.5升/分钟 @ 27ºC 环境温度范围:              7 to 38ºC 杜瓦从293K冷却时间:        <36 小时 输入氦气压力:              0-200 Psig

Cryomech, Inc. now manufactures Liquid Helium Plants. The Plants allow the user to liquefy 12 and 18
liters/day of Helium from any room temperature source. Laboratories can now manage their own liquid
Helium consumption and conservation. With a properly sized Helium recovery system, facilities with
several cryostats with different boil off rates can use one Liquid Helium Plant. Additional Helium can be
added to the system from cylinders.
All Cryomech Liquid Helium Plants work with exactly the same group of components:
Cryorefrigerator: The LHeP12 and LHeP18 use a Cryomech 4K Pulse Tube Cryocooler to liquefy Helium
inside a production dewar. The Helium condenses on the 4K second stage of the PTR then drips to the
bottom of the dewar. The unique properties of the Pulse Tube Cryocoolers enable the high production
rates and low input power for each system. Cryomech has been manufacturing 4K Pulse Tube Cryocoolers
since 1999. The 4K PTRs have an unmatched record for reliability and long mean time between maintenance,
which dramatically reduce the cost of operation.
Dewar Assembly, Level Indication and Extraction: The LHePs are designed to operate continuously,
if required. An automatic liquid level indicator will shut the plant down when the production dewar is full or
there is an interruption in the supply of Helium into the dewar. The system will automatically restart after a
short period of time to prevent Helium from escaping the dewar （this is done pneumatically）. After the user
has extracted liquid, it will automatically re-start. This is controlled by the liquid level gauge.
 Extraction Line:The customer is responsible for the 99.8% pure Helium gas supply. All impurities entering
the LHePs （the production dewar） will freeze to the outside of the 4K PTR. Some of the impurities will
eventually drop to the bottom of the dewar. When the impurity levels in the gaseous Helium are too high,
the impurities will build up a layer of solid impurity, reducing the heat transfer into the PTR, reducing
the liquefaction rate. （None of the components have been damaged.） The procedures for the recovery
from such an event, is to transfer out all the liquid Helium, warm up the dewar, evacuate out the contaminants,
then recharge the system with Helium and restart the LHeP. These procedures are straight forward with a 2
stage vacuum pump and a cylinder of 99% pure helium. The most time consuming part of this process
is warming up the dewar assembly.
For the proper installation into your laboratory you will need to consider a recovery system or plan to use
gaseous Helium. A standard size single cylinder of Helium is equal to approximay 8 liters of Liquid
Helium. The LHeP is an opportunity to manage your Liquid Helium consumption, but it is only part of the
solution. The rest of the solution is your recovery system and proper procedures implemented and followed
by the laboratory team.
其它相关产品：
氦气回收系统，单系统氦液化器，

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