Flojet Duplex II Bypass Pumps

Flow 4.2 to 7.2 Lpm
Internal bypass function
12, 24, 115 & 230 Volt options
Viton, Santoprene, EPDM & Buna

Models equipped with an external bypass system are designed to pump at high pressures while at low or high flow rates. Models equipped with a bypass only will continue to run until the power is manually turned off. The Duplex II pumps are not recommended for continuous duty service due to limited motor brush life. Operation at lower pressures and temperatures, however, will extend overall pump service life.

CODE: D3121B1211AR
Flojet Duplex II Bypass Pump - 12V D3121B1211AR
- 2.1 Bar bypass
- 4.2 Lpm max flow
- No pressure switch
- 12 Volt DC, 3.0 Amps
- Buna diaphragm
- Buna check valve
- 3/8"NPTF ports
Excl. VAT: £139.13 Incl. VAT: £166.96
CODE: D3131H1311AR
Flojet Duplex II Bypass Pump - 12V D3131H1311AR
- 3.4 Bar bypass
- 5.7 Lpm max flow
- No pressure switch
- 12 Volt DC, 7.0 Amps
- Santoprene diaphragm
- EPDM check valve
- 3/8"NPTF ports
Excl. VAT: £111.07 Incl. VAT: £133.28
CODE: D3131V1311AR
Flojet Duplex II Bypass Pump - 12V D3131V1311AR
- 3.4 Bar bypass
- 5.7 Lpm max flow
- No pressure switch
- 12 Volt DC, 7.0 Amps
- Viton diaphragm
- Viton check valve
- 3/8"NPTF ports
Excl. VAT: £153.05 Incl. VAT: £183.66
CODE: D3134H1311AR
Flojet Duplex II Bypass Pump - 12V D3134H1311AR
- 3.4 Bar bypass
- 7.2 Lpm max flow
- No pressure switch
- 12 Volt DC, 8.0 Amps
- Santoprene diaphragm
- EPDM check valve
- 3/8"NPTF ports
Excl. VAT: £136.15 Incl. VAT: £163.38
CODE: D3135B1311AR
Flojet Duplex II Bypass Pump - 12V D3135B1311AR
- 3.4 Bar bypass
- 7.2 Lpm max flow
- No pressure switch
- 12 Volt DC, 8.0 Amps
- Buna diaphragm
- Buna check valve
- 3/8"NPTF ports
Excl. VAT: £142.12 Incl. VAT: £170.54
CODE: D3135H1411AR
Flojet Duplex II Bypass Pump - 12V D3135H1411AR
- 4.8 Bar bypass
- 7.2 Lpm max flow
- No pressure switch
- 12 Volt DC, 7.0 Amps
- Santoprene diaphragm
- EPDM check valve
- 3/8"NPTF ports
Excl. VAT: £143.11 Incl. VAT: £171.73
CODE: D3221B1211AR
Flojet Duplex II Bypass Pump - 24V D3221B1211AR
- 2.1 Bar bypass
- 4.2 Lpm max flow
- No pressure switch
- 24 Volt DC, 2.0 Amps
- Buna diaphragm
- Buna check valve
- 3/8"NPTF ports
Excl. VAT: £146.09 Incl. VAT: £175.31
CODE: D3231V1311AR
Flojet Duplex II Bypass Pump - 24V D3231V1311AR
- 3.4 Bar bypass
- 5.7 Lpm max flow
- No pressure switch
- 24 Volt DC, 3.5 Amps
- Viton diaphragm
- Viton check valve
- 3/8"NPTF ports
Excl. VAT: £160.01 Incl. VAT: £192.01
CODE: D3235H1411AR
Flojet Duplex II Bypass Pump - 24V D3235H1411AR
- 4.8 Bar bypass
- 7.2 Lpm max flow
- No pressure switch
- 24 Volt DC, 3.5 Amps
- Santoprene diaphragm
- EPDM check valve
- 3/8"NPTF ports
Excl. VAT: £143.11 Incl. VAT: £171.73
CODE: D3722B1211ARL
Flojet Duplex II Bypass Pump - 230V D3722B1211ARL
- 2.1 Bar bypass
- 4.2 Lpm max flow
- No pressure switch
- 230 Volt, 0.3 Amps
- Buna diaphragm
- Buna check valve
- 3/8"NPTF ports
Excl. VAT: £189.82 Incl. VAT: £227.78
CODE: D3732H1311ARL
Flojet Duplex II Bypass Pump - 230V D3732H1311ARL
- 3.4 Bar bypass
- 5.7 Lpm max flow
- No pressure switch
- 230 Volt, 0.4 Amps
- Santoprene diaphragm
- EPDM check valve
- 3/8"NPTF ports
Excl. VAT: £184.85 Incl. VAT: £221.82
CODE: D3735H1411ARL
Flojet Duplex II Bypass Pump - 230V D3735H1411ARL
- 4.8 Bar bypass
- 7.2 Lpm max flow
- No pressure switch
- 230 Volt, 0.4 Amps
- Santoprene diaphragm
- EPDM valve
- 3/8"NPTF ports
Excl. VAT: £186.84 Incl. VAT: £224.21

Flojet Duplex II Bypass Pumps

The Duplex II series of pumps incorporate the best technology and features developed by ITT Flojet. everything from the backflow preventer, check valves, bearings and diaphragm assembly to the motor, has been designed to make this truly the most advanced and reliable diaphragm pump available. higher efficiency of the pump is evident in the long life of the motor pump unit. The new diaphragm design combined with the new valves, makes the pump capable of pulling a higher dry vacuum. Duplex II is available in various performance ranges, voltages and with a choice of elastomers, making it easily adaptable to a diverse range of applications.