B C D E

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NC

1.8-4.0bar 8-10bar

2-4bar1-3bar1-6bar

5-14bar

10

/

female

/ /

/ /

/

/

/

R1/4

R1/2

G1/4

G1/2

/

/

Φ6.0mm

Φ6.4mm

Φ6.5mm

/

/

/

B C

E

/

/

0

1

2

3

4

5

6

/ /

/

/

/

Unloader Valve

Air With

F

Air compressor and pump pressure switch

Pressure setting:Cut in 7.5bar

Number Unloader Valve Type

Unloader Valve Connection

Connection Size

Connection Type

Handle Type

/

single port

/

four ports

/

/

three ports

without

D vertical

without without

F ON/OFF Knob

ModelOperating

Pressure RangeFactorySettingDifferential

ElectricalRating

ContactArrangement

Media

Conversion: 1kgf/cm²=14.2psi 1bar=14.5psi

1.4-3.5bar 6-8bar

Dimension in:mm

single port

/

/

/

/

female

male

/

/

/

/

B C

B

/

Conversion: 1kgf/cm²=14.2psi 1bar=14.5psi Other connections are available on request.

15-82psi

NC

R1/4

R3/8

G1/4

G3/8

1

2

3

4

5

6

Number

C

30-100psi

20-35psi

30-50psi

15-30psi

20-35psi

NO

35-150psi 30-40psi

80-15psi

100-30psi

150-35psi

50-30psi

100-75psi

125-95psi

17-30psi

25-30psi

30-45psi

11

Pump pressure switch

Contact Type: NC NO Pressure setting:Cut in 35psi

7

8

/ /

/ /

ModelOperating

Pressure RangeFactorySetting Differential

ElectricalRating

ContactArrangement ConnectionMedia

Water

Water

Water

Water

Water

Water

Connection SizeConnection Type

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Dimension in:mm

LF19 Order Ref NO

LF19 - 4 1 1 1 2 1 - 7.5 - 10.5bar

Cut off 10.5bar

LF19 pressure switches provide time tested, reliable control for automatic water systems. The switch is universally acceptable for use as original equipment on water well pumps or pumping systems. It is available with an On-Off knob for manual cut off the pump.

1/4NPT

1/2NPT

Specification

LF19 2-11bar250VAC

16A/25A

LF10-W series pressure switches provide time

tested, reliable control for automatic water

systems. The switch is universally acceptable

for use as original equipment on water well

pumps or pumping systems.

LF10-WS and LF10-WR Order Ref NO

LF10(A) - W(S or R) - 1 1 1 - 30 - 50psi

Cut off 50psi

G1/4 Bolt Connectin

3/8NPT

1/4NPT

NPT1/4 Long Male

Specification

LF10-WS

(LF10A-WS)

LF10-WR

(LF10A-WR)

85-115psi

120VAC、20A

(120VAC、26A)

240VAC、12A

(240VAC、26A)

240VAC、20A

(120VAC、26A)

240VAC、12A

(240VAC、26A)

1/4NPT

Male or

Female

1/4NPT

Male or

Female

84

76

65

93.9

32.2

71.5

118.5

64.8