Series SK 、2SK and SZ water ring vacuum pumps can be used to pump water vapour as well as ordinary gases. Because they own the features of constant temperature compressing, they can pump inflammable, explosive and corrosive gas.
Series 2YK liquid ring vacuum pumps own the features of high vacuum and better applicability. When suitable actuating medium or sometimes pumped medium can be chosen as actuating liquids, the series pumps almost can pump all industrial gases. Aforesaid pumps own the features of reposefully operation, low noise and less than 30 percent of energy consumption compared with water vapour jet vacuum pump. So the liquid ring pumps can be widely used for light, food, medicine, paper making and electric utility industries etc.

There are projects as follow for consumer to choose
1.AThere are projects as follow for consumer to choose ccording as the degree of vacuum
●If the pump is operated for long time with the inlet pressure ranging between 1.3×104Pa and 1×105Pa(between 100 and 760 Torr). Please choose series SK water ring vacuum pump.
●If the pump is operated for long time with the inlet pressure ranging between 5×103Pa and 1.3×104Pa(between 40 and 100 Torr). Please choose series 2SK water ring vacuum pump.
●If the pump is operated for long time with the inlet pressure ranging between 1×103Pa and 5×103Pa(between 8 and 40 Torr). Please choose series 2YK liquid ring vacuum pump.
2.Working liquid
●The water with normal temperature. The temperature of supply water range best from 5℃ to 20℃. The highest temperature of supply water should be not higher than 40℃.
●Transformer oil or industrial oil with low viscosity and saturation vapour pressure. The highest suitable temperature of the oil should be not higher than 60℃, for example electric utility industry: Vacuum drying.
●Chemical liquid, choose direct the chemical raw material with low saturation vapour pressure, for example ethylamine etc.
●Besides the water with normal temperature, if choose other working liquid, should equip separator and radiator etc. the dynamic seal of the shaft should use the mechanical sealing. Detailed performances see the list.
3.Choose the dynamic seal of the shaft：
●Choose the asbestos coil when the pump is used in the generic occasion.
●Choose the mechanical sealing when the pump is used in no leak occasion.
4.Choose the material of the part that the gas passed.：
●Besides the shaft, other parts are made of cast iron or alloy of copper; it is suitable for pumping no corrosive gas.
●Stainless steel 304 and 306, it is suitable for pumping corrosive gas.
●Engineering-oriented plastic, it is suitable for pumping acidic and corrosive gas.
5.If the pump is used for pump gas and transport gas. The pressure of gas outlet port exceeds atmosphere pressure. We choose the pump according as something as follow：
●If the pressure of gas outlet port is exceed 0.15Mpa, should choose the especial double-stage liquid ring compressor and should not choose the refitted vacuum pump. The power should be augmented. Should equip the especial separator and auto-drainage.
●If the pressure of gas outlet port is under 0.15Mpa, can choose the refitted vacuum pump as compressor.
6.Methods of installation water ring vacuum pump system
●When the working liquid of the gas outlet port do not recirculate or part recirculate. Should use the opening circulation system.
●When the working liquid of the gas outlet port must recirculate and not drained off. Should use the closing circulation system.

Model SK pump main performance-parameter table

Model	Pumping speed	Ultimate pressure		Power		Rotating speed	Water supply	Inlet ＆ outlet dimensions	Weight
	m3/min	hPa	Torr	kw		r/min	L/min	mm	kg
SK-0.5B	0.5	47	35	1.5		2900	8	1"	45
SK-0.8	0.8	47	35	2.2		2900	10	40	60
SK-1.5	1.5	47	35	4		2900	15	40	75
SK-3	3	80	60	5.5		1450	25	50	153
SK-6	6	80	60	11		1450	35	50	210
SK-9	9	80	60	18.5		980	55	80	400
SK-12	12	80	60	22		980	70	128	600
SK-12B	12	80	60	18.5		980	60	100	450
SK-20	20	80	60	45		980	70	100	800
SK-25	25	80	60	45		980	70	100	900
SK-30A	30	80	60	55		740	100	100	1200
SK-42	42	80	60	75		740	100	100	1500

Model SK-3～SK-42 pump outline & lnstallation dimension drawing 

Model	L1	L2	L3	L4	L5	L6	L7	L9	L	H1	H	D	d	B	n-c	m-k
SK-3	690	1030	170	455	505	466	220	26	1302	538	653	140	50	110	4-Ø14.5	4-Ø23
SK-6	820	1244	220	455	505	508	220	28.5	1527	538	653	140	50	110	4-Ø14.5	4-Ø23
SK-9	1120	1420	150	504	550	580	285	55	1770	628	856	185	80	150	4-Ø18.5	6-Ø25
SK-12	1180	1540	180	504	550	585	285	65	1820	628	796	220	128	180	4-Ø18.5	6-Ø25
SK-20	1340	1700	180	570	620	720	370	70	2085	740	1000	230	100	180	8-Ø18	6-Ø22
SK-25	1560	1880	160	570	620	720	370	131	2177	740	920	230	100	180	8-Ø18	8-Ø22
SK-30A	1800	2120	160	684	740	946	350	218	2450	880	1080	235	100	200	6-Ø18	8-Ø27
SK-42	1920	2320	200	684	740	944	350	253	2689	880	1080	235	100	200	6-Ø18	8-Ø27