UL221 Unloader

UL221 Unloader Valve

  • £168.75
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SPECK UL221 Unloader Valve.

Available in 3 different pressure ratings.

Part no

MODEL

L/MIN

BAR

GPM

PSI

00.0639

UL221/100

50

100

11.0

1450

00.0640

UL221/140

50

140

11.0

2030

00.0817

UL221/200

50

200

11.0

3045

Min Flow Rate 5 litre/min
Water Temperature Max. 70°C

Construction Characteristics
• Ball Kick-Back Valve, Taper Kick-Back Valve or Plate Kick-Back Valve.
• Casing of Brass.
• Interchangeable Stainless Steel Valve Seats.
• Connections for Manometer, Pressure Switch and Flow Switch.

Operation
The whole discharge must be guided through the valve. Should the actual operating pressure exceed the adjusted operating pressure, the valve then acts as a pressure regulator. The valve switches to pressure-free bypass operation when the spray gun shuts off and the spray pressure between gun and valve remains idle.
The valve can be operated together with several spray guns. It is also possible to connect several pumps to one common discharge line.

Safety Instructions
Observe direction of flow. The bypass must under no circumstances be closed or fitted with any shut- off device.
Continuous bypass operation without re- leasing the water can cause the liquid to heat up which in turn could damage the unit and endanger persons.
Possible preventive measures:
1.) Limit the bypass duration (max. temperature 70°C); the duration is to be calculated by the operator and in conjunction with the operating conditions.
2.) Use fittings (e.g. thermo valve on water inlet) to avoid heat increase.