中国总代理（福斯FLOWSERVE集团）
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Liquid ring vacuum pumps 液环式真空
in close coupled design 机泵同轴设计
LEMC 25, 50, 90, 125, 150, 250
PRESSURE RANGE:
入口压力范围： 33 – 1013 mbar
SUCTION VOLUME:
入口流量： 24 - 280 m3/h
CONSTRUCTION TYPE
结构型式
SIHI liquid ring vacuum pumps are displacement pumps of
uncomplicated and robust construction with the following particular
features:
SIHI 液环式真空泵是结构简单使用可靠的容积变化式泵,具有如下特点：
nearly isothermal compression
几乎等温压缩,
oil-free, as no lubrication in the working chamber
therefore non-polluting
在工作腔内无需润滑,因而无油,纯净
Capable of handling of nearly all gases and vapours
可处理几乎所有的气体和蒸汽
small quantities of entrained liquid can be handled
可处理少量的夹带液体
easy maintenance and reliable operation
易维护,高可靠性
low noise and nearly free from vibration
低噪音,几乎无振动
wide choice of materials, therefore alicable nearly
everywhere
广泛的材质选择,基本上可用于所有场合
shaft not in contact with the medium
轴不接触介质
protection against cavitation as standard
气蚀保护作为标准配置
incorporated dirt drain
一体式排污
no metallic contact of the rotating parts
旋转部件没有金属接触
SIHI liquid ring vacuum pumps LEMC are single-stage
SIHI LEMC 系列液环式真空泵是单级泵。
APPLICATION
应用
Handling and exhausting of dry and humid gases; entrained liquid can
be handled during normal duty. The pumps are applied in all fields
where a pressure of 33 to 900 mbar must be generated
干气和湿气的处理和抽除;正常条件下可处理夹带的液体. 此真空泵可
用于所有需要33 mbar到900 mbar的场合。
NOTE
泵运转期间需连续不断地补充工作液（通常为水）,以带走
气体压缩而产生的热量和补充部分随气体排出的工作液。此
部分工作液可在汽液分离器中与气体分开（请见样本附件部
分）,以重新利用。
泵可按需要配备一个连接,以保证在运转条件下连续地排放
被污染的工作液。
The direction of rotation is clockwise, when looking from the
motor towards the pump.
从泵的驱动端看,泵的旋转方向为顺时针。
2
GENERAL TECHNICAL DATA 常规技术数据
Pump type
泵型号 Unit
单位
LEMC25
LEMC50
LEMC90
LEMC125
LEMC150
LEMC250
Synchronous speed
同步转速 50 Hz rpm 3000 1500
Max. compression over atmospheric pressure
较大背压 bar 0,3
Max. admissible pressure difference
允许较大压差 bar 1,1
Test pressure above atmospheric pressure
水压试验（表压） bar 1 1 3 3 3 3
Moment of inertia of the rotating pump parts and water filling
满水时转动部件的惯性力矩 kg . m2 0,003 0,0095 0,035 0,053 0,069 0,097
Sound pressure level at a suction pressure of 80 mbar
在80mbar 入口压力下的噪音 dB (A) 68 69 65
Dry gas
Max. gas temperature 干气 °C 200
较大吸气温度
Saturated gas
饱和气 °C 100
Service liquid 工作液
max. recommended temperature for water as working liquid
工作液为水的较大推荐温度 °C 40
max. admissible temperature for other suitable working liquids
对适合的工作液较大允许温度 °C 80
max. kinematic viscosity
较大动粘度 mm2/s 4
max. density
较大密度 kg/m3 1200
volume up to shaft level
到轴中心线的容积 liter 0.3 0.4 2.4 2.8 3.2 4.0
The combination of several limiting values is not admissible.
不允许将几种较限值同时选择
Material design 材料设计
Item 0K 0E
位号
Component
零件 LEMC 25/50 LEMC 90/125/150 LEMC 250
10.10 Casing
泵盖
10.90 Central body
中间体
13.70 Guide disc
导流盘
0.6025
23.50 Vane wheel impeller
叶轮 1.4301 1.4408
XBPFF GBVGG EBPFF
Ceramic 陶瓷 Cr-Ni-St 铬钢 Cr-Ni-St 铬钢
Carbon 石墨 Carbon 石墨 Carbon 石墨
Perbunan 丁苯橡胶 Viton 氟橡胶 Perbunan 丁苯橡胶
Mechanical seal
Material option 1
机械密封
材料选择1
Cr-Ni-St 铬钢 Cr-Ni-Mo-St 铬镍钼钢 Cr-Ni-St 铬钢
GBMGG
Cr-Ni-Mo-St 铬镍钼钢
Carbon 石墨
Viton PTFE encapsulated 氟橡胶外包裹聚四氟乙烯
43.30
Mechanical seal
Material option 2
机械密封
材料选择2
Not available 不提供
Cr-Ni-Mo-St 铬镍钼钢
PTFE
75.40 Valve balls
阀球 聚四氟乙烯