SR Series
 Type B and BR

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  • Manually adjustable output with spring return function
     
  • Suitable for use with abrasive liquids with small amounts of solids in suspension for all drip proof / airtight applications
     
  • Available in many different materials of construction including PVC, PTFE, PVDF and Stainless Steel to suit most chemicals
     
  • Output capacities up to 1068 litres/hr
     
  • Higher outputs available via multiple headed pumps
     
  • Pressures up to 50 bar (725 psi)
     
  • BR Series are equipped with a hydraulic oil reservoir which automatically maintains correct reservoir levels

Technical Features

All pumps are fitted as standard with gearbox reduction system and with vertically mounted V18 shaped electric motor that conform to the UNEL-MEC specifications. The motor's power range is from 0.18 kW up to 0.55 kW at European standard 3 phase voltages of 230/400V @ 50Hz, 4 poles.

The motors conform to the UNEL-MEC specifications and are available with different voltages, frequencies, insulation standards and special explosion proof versions.

The gearbox utilises a worm-wheel reduction system with all bearings fully supported within the fully lubricated gearbox.

The manually adjustable output with spring return is operated by micrometer type stroke limiter, which adjusts the piston delivery stroke (output), while the suction stroke (reload) is spring assisted.

Capacity adjustment can be effected whilst in operation or at rest. The movement of the piston is controlled by a precise reciprocating gearbox which ensures an accurate and repeatable volumetric displacement.

Automatic remote flow control adjustment is also available by means of servo control units, with 4-20mA control signal, or by means of a 3 - 15 psi pneumatic control signal.

The simple build configuration and a small number of component parts allow an easy checking and maintenance.

Spring Return Piston/Hydraulic Diaphragm Dosing Pumps (49 - 1068 Ltrs/hr)

Materials of Construction Codes
TYPE PUMPING HEAD PISTON VALVES (balls) VALVES SEATS DIAPHRAGM PISTON GASKETS
29 PP AISI 420 TEMP PYREX PP PTFE/NBR T20
41 AISI 316 AISI 420 TEMP AISI 316 AISI 316 PTFE/NBR T20
43 PVC AISI 420 TEMP PYREX PVC PTFE/NBR T20

Product Code Description

B and BR series Hydraulic Diaphragm Dosing Pumps are available in three different sizes:

   B 125 N - Max 108 Ltrs/hr
   B 175 N - Max 418 Ltrs/hr
   B 250 N - Max 1068 Ltrs/hr

   BR 125 N - Max 108 Ltrs/hr
   BR 175 N - Max 418 Ltrs/hr
   BR 250 N - Max 1068 Ltrs/hr

For these three types 11 different piston sizes are available to suit each clients' applications for capacity and pressure.

Hydraulic diaphragm metering pumps are suitable for use when:

   The dosed liquid is of abrasive type with small amounts of solids in suspension.

   The dosed liquid is a toxic solution.

   A drip proof/air tight application is required.

   High pressure dosing is required.
Standard materials of pump-head construction:

AISI 316 Stainless steel and PVC.
Available in many different materials of construction to suit the chemicals in use.

Jacketed pump-heads for either cooling or heating are available to suit requirements.

Piston seals are in polyurethane rubber.

Valves

Heads

All pumps are fitted as standard with gearbox reduction system and with vertically mounted V18 shaped electric motor that conform to the UNEL-MEC specifications.

The motor's power range is from 0.18 kW up to 0.55 kW at European standard 3 phase voltages of 230/400V @ 50Hz, 4 poles.

Multiple Headed Pumps

Different multiple heads units are available on request.  Each pumping element is independently adjustable both in operation or at rest.


Pump Model Specifications

B125N
 
Pump type Reducer ratio Strokes number (*1) Capacity (*2) Max Pressure (*3) Connections (*4) Motor ø mm ø mm Stroke Net Weights Kg (*5)
L/1' L/h Kg/cm2 Options Effective Membrane
  (*1) 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz SS 316 PVC SS 316 PVC   Piston Diaphragm Length SS 316 PVC
B-125N- 8 F 58 70 0,025 0,030 1,5 1,8 20 10 1/2" G.m. 0.18 kW
3 Ph ~
1400 rpm

 
or 
0.18 kW
1 ph ~
1400 rpm

 8 50 12.5 9,5 8
C 96 116 0,040 0,050 2,4 3
B 116   0,050   3  
B-125N- 12 I 35 42 0,045 0,054 2,7 3,2 12 9,5 8
F 58 70 0,075 0,090 4,5 5,4
C 96 116 0,123 0,150 7,4 9
B 116   0,150   9  
B-125N- 18 I 35 42 0,110 0,132 6,6 7,9 18 70 10 9,5
F 58 70 0,183 0,220 11 13,2
C 96 116 0,300 0,366 18 22
B 116   0,366   22  
B-125N- 25 I 35 42 0,211 0,252 12,6 15,1 20 25 10 9,5
F 58 70 0,350 0,420 21 25,2
C 96 116 0,566 0,700 34 42
B 116   0,700   42  
B-125N- 30 I 35 42 0,301 0,360 18 21,6 14 30 10 9,5
F 58 70 0,500 0,600 30 36
C 96 116 0,816 1,000 49 60
B 116   1,000   60  
B-125N- 40 I 35 42 0,543 0,650 32,5 39 8 40 90 11 11
F 58 70 0,900 1,080 54 65
C 96 116 1,483 1,800 89 108
B 116   1,800   108  

(*1) Piston strokes per 1 minute with 4 poles installed motor
I = Reducer ratio 1 : 40 = 35 strokes at 50 Hz / 42 strokes at 60 Hz
F = Reducer ratio 1 : 24 = 58 strokes at 50 Hz / 70 strokes at 60 Hz
C = Reducer ratio 1 : 14,5= 96 strokes at 50 Hz / 116 strokes at 60 Hz
B = Reducer ratio 1 : 12 = 116 strokes at 50 Hz
(*2) The indicated capacity value is subject to changes due to the working pressure, the dosed liquid, the viscosity and the installation asset.
(*3) Higher pressures are available.
(*4) If requested, different range of connections are available.
(*5) The weight is approximate and reflects the pump fitted with a totally enclosed fan-cooled outdoor motor.
(6) The pumps can be supplied with accessories if requested.
(7) The pumps are painted with a 2 part EPOXY-POLYAMIDE PAINT RAL 7030.


B175N
 
Pump type Reducer ratio Strokes number (*1) /1' Capacity (*2) Max Pressure (*3) Connections (*4) Motor ø mm ø mm Stroke Net Weights Kg (*5)
L/1' L/h Kg/cm2 Options Effective Membrane
  (*1) 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz SS 316 PVC SS 316 PVC   Piston Diaphragm Length SS 316 PVC
B-175N- 8 F 70 84 0,043 0,052 2,6 3,12 20 10 1/2" G.m. 0.25 kW
3 Ph ~
1400 rpm
or 
0.25 kW
1 ph ~
1400 rpm		 8 50 17.5 11,5 11
C 96 116 0,058 0,070 3,5 4,2
B 120   0,073   4,4  
B-175N- 12 F 70 84 0,126 0,152 7,6 9,12 12 12 11,5
C 96 116 0,173 0,206 10,4 12,4
B 120   0,216   13  
B-175N- 18 F 70 84 0,300 0,360 18 21,6 18 70 12 11,5
C 96 116 0,400 0,480 24 28,8
B 120   0,533   32  
B-175N- 25 F 70 84 0,600 0,720 36 43,2 25 12,5 12
C 96 116 0,816 0,980 49 58,8
B 120   1,016   61  
B-175N- 30 F 70 84 0,850 1,020 51 61,2 30 12,5 12
C 96 116 1,150 1,380 69 82,8
B 120   1,466   88  
B-175N- 40 F 70 84 1,533 1,840 92 110,4 12 40 90 13,5 12
C 96 116 2,100 2,52 126 151,2
B 120   2,630   158  
B-175N- 50 F 70 84 2,400 2,880 144 172,8 7,5 3/4" G.m. 50 120 16 15
C 96 116 3,283 3,940 197 236,4
B 120   4,116   247  
B-175N- 55 F 70 84 2,900 3,480 174 208,8 6,3 55 16 15
C 96 116 3,966 4,760 238 285,6
B 120   4,983   299  
B-175N- 65 F 70 84 4,050 4,860 243 291,6 4.5 65 16 15
C 96 116 5,550 6,660 333 399,6
B 120   6,960   418  
(*1) Piston strokes per 1 minute with 4 poles installed motor
F = Reducer ratio 1 : 20 = 70 strokes at 50 Hz / 84 strokes at 60 Hz
C = Reducer ratio 1 : 14,5 = 96 strokes at 50 Hz / 116 strokes at 60 Hz
B = Reducer ratio 1 : 11 = 120 strokes at 50 Hz
Notes: See next page

B250N
 
Pump type Reducer ratio Strokes number (*1) Capacity (*2) Max Pressure (*3)   Motor ø mm ø mm Stroke Net Weights Kg (*5)
L/1' L/h Kg/cm2 Connections (*4) Options Effective Membrane
  (*1) 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz SS 316 PVC SS 316 PVC   Piston Diaphragm Length SS 316 PVC
B-250N- 40 F 56 67 1,75 2,10 105 126 20 10 3/4"  G.m. 0.55 kW
3 Ph ~
1400 rpm


or 
0.55 kW
1 ph ~
1400 rpm

 40 120 25 26 23
C 96 116 3,00 3,60 180 216
B 112   3,50   210  
B-250N- 50 F 56 67 2,75 3,30 165 198 15 50 26 23 
C 96 116 4,70 5,63 282 338
B 112   5,50   330  
B-250N- 55 F 56 67 3,33 4,00 200 240 12,5 55 26 23
C 96 116 5,70 6,83 342 410
B 112   6,66   400  
B-250N- 65 F 56 67 4,63 5,56 278 333,6 9 1" G.m. 65 160 37 26
C 96 116 7,93 9,52 476 571,2
B 112   9,26   556  
B-250N- 75 F 56 67 6,18 7,42 371 445,2 6,6 75 37 26
C 96 116 10,60 12,72 636 763,2
B 112   12,36   742  
B-250N- 90 F 56 67 8,90 10,68 534 640,8 4,7 90 37 26
C 96 116 15,25 18,30 915 1098
B 112   17,80   1068  

(*1) Piston strokes per 1 minute with 4 poles installed motor
F = Reducer ratio 1 : 25 = 56 strokes at 50 Hz / 67 strokes at 60 Hz
C = Reducer ratio 1 : 14,5 = 96 strokes at 50 Hz / 116 strokes at 60 Hz
B = Reducer ratio 1 : 12,5 = 112 strokes at 50 Hz
(*2) The indicated capacity value is subject to changes due to the working pressure, the dosed liquid, the viscosity and the installation asset.
(*3) Higher pressures are available.
(*4) If requested, different range of connections are available.
(*5) The weight is approximate and reflects the pump fitted with a totally enclosed fan-cooled outdoor motor.
(6) The pumps can be supplied with accessories if requested.
(7) The pumps are painted with a 2 part EPOXY-POLYAMIDE PAINT RAL 7030.