Boshan Jinggong Pumps Co., Ltd.
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  • Contact Person : Mr. Chen Yang
  • Company Name : Boshan Jinggong Pumps Co., Ltd.
  • Tel : 86-533-18605333838
  • Fax : 86-533-4292609
  • Address : Shandong,Zibo,No.2 Renmin Road, Boshan District.
  • Country/Region : China
  • Zip : 255200

Roots-water ring pump package unit

Roots-water ring pump package unit
Product Detailed
Related Categories:Pumps
The units are applied to exhausting normal gases and gases with water, organic solvents or a little dust. Overview: Each roots water ring pump unit of JZJ series is an exhauster unit comprising a JZ roots water ring pump as main pump and a 2BV water ring pump/2BE1 water ring pump/SK water ring pump or roots-water ring pump unit as a backing pump. The units are applied to exhausting normal gases and gases with water, organic solvents or a little dust. Compared with normal mechanical vacuum pumps, the units resist oil, steam and dust. Compared with normal water ring vacuum pumps, they have high vacuums and high exhaust speeds under high vacuum. The backing pumps for the roots water ring pump units usually use water as the operating fluid as well as organic solvents (methanol, ethanol, xylene, acetone, etc.) or other liquids. The backing pumps are closed circulatory systems, remarkably reducing environmental pollution and increasing recycle rate of organic solvent. The limiting vacuum is determined by saturated vapor pressure of the operating liquid.Model expression:       Common ratios of JZJ roots-water ring vacuum pump units: 

Package unit model

Pump model

Suction rate(L/s)

Limited vacuum (Pa)

Main pump

Backing pump(/means or)

JZJ2BV/2SK   70-1

ZJ(P)70

2BV110/2SK-3

70

First grade roots unit

 267

JZJ2BV/2SK  150-2

ZJ(P)150

2BV111/2BV121/2SK-3

150

JZJ2BV/2SK  150-1

ZJ(P)150

2BV131/2SK-6

150

JZJ2BV/2SK  300-2

ZJ(P)300

2BV131/2BV161/2SK6

300

JZJ2BE/2SK  300-1

ZJ(P)300

2BE1-202/2SK-12

300

JZJ2BE/2SK 

 600-2

ZJ(P)600

 2BE1-202/2BE1-203 

/2SK-12/2SK-20

600

JZJ2BE 600-1

ZJ(P)600

2BE1-252/2BE1-253

600

JZJ2BE 1200-2

ZJ(P)1200

2BE1-252/2BE1-253

1200

JZJ2BE 1200-1

ZJ(P)1200

2BE1-303

1200

JZJ2BV/2SK70-2.1

ZJ(P)70

ZJ(P)30+2BV110/2SK-3

70

Second grade roots unit

67

JZJ2B150-2.1

ZJ(P)150

ZJ(P)70+2BV111

150

JZJ2B150-4.1

ZJ(P)150

ZJ(P)30+2BV110

150

JZJ2BV/2SK 300-2.1

ZJ(P)300

ZJ(P)150+2BV131/2SK-6

300

JZJ2B300-2.2

ZJ(P)300

ZJ(P)150+2BV121

300

JZJ2B300-4.1

ZJ(P)300

ZJ(P)70+2BV111

300

JZJ2B 600-4.1

ZJ(P)600

ZJ(P)150+2BV131

600

JZJ2BV 600-2.2

ZJ(P)600

ZJ(P)300+2BV161/

2BE-202

600

  JZJ2BV 1200-4.2

ZJ(P)1200

ZJ(P)300+2BV161

1200

JZJ2BE/2SK

 1200-4.1

ZJ(P)1200

ZJ(P)300+2BE-202/

2SK-12

1200

   JZJ2BE 

1200-2.2

ZJ(P)1200

ZJ(P)600+2BE1-203

1200

JZJ2BE1

200-2.1

ZJ(P)1200

ZJ(P)600+2BE1-252

1200

     JZJ2BV 

 150-2.2.1

ZJ(P)150

ZJ70+ZJ30+2BV110

150

Third grade roots unit

0.5

    JZJ2BV  

300-2.2.1

ZJ(P)300

ZJ150+ZJ70+2BV111

300

 JZJ2BV/2SK 

300-4.2.1

ZJ(P)300

ZJ70+ZJ30+2BV110/2SK1.5

300

   JZJ2BV  

600-2.2.1

ZJ(P)600

ZJ300+ZJ150+2BV131

600

JZJ2BV/2SK 

 600-4.2.1

ZJ(P)600

ZJ150+ZJ70+2BV111/2SK3

600

   JZJ2BV /2SK 

1200-4.2.1

ZJ(P)1200

ZJ300+ZJ150+2BV131/2SK6

1200

   JZJ2BE/2SK

  1200-2.2.1

ZJ(P)1200

ZJ600+ZJ300+2BE1-202/2SK-12

1200

 Note:1. Values described above are common pump ratios. The limiting vacuums and exhaust speeds are ideal values under standard condition. Actual performances of the unit are determined by working condition. 2. The limiting vacuum of the unit can be increased to a certain degree when the circulating liquid of the water ring pump is oil or other liquids with low saturated vapor pressures. 3. The roots pump will heat and the limiting vacuum will fall when performance differences between the main pump and backing pump are over large. Such problem deserves special attention as it affects stable operation of the unit. For better reliability of the unit, we suggest larger ratio for the backing pump as long as overall power is maintained.   4. When the roots pump is combined with a water ring pump, water in the water ring pump may flow into the roots pump when the unit stops, resulted in emulsification of oil in gear box of the roots pump after a certain period. Our company equips a liquid stopper at inlet of the water ring pump and an air pocket between the water ring pump and roots pump so as to prevent the backflow, thus the unit is more reliable. 

Roots-water ring pump package unit



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