Cla-Val 60-11 Booster Pump Control Valve with Built-In Check

Starting and stopping a booster pump without pipeline surge

The Cla-Val 60-11 is a pilot-operated valve installed on the discharge of a booster pump to eliminate pipeline surges caused by starting and stopping the pump. The pump starts against a closed valve. When the pump is started, the solenoid control is energized and the valve opens slowly, raising line pressure gradually to full pumping head. At shutdown the solenoid is de-energized and the valve closes slowly while the pump keeps running.

When the valve is fully closed, a limit switch assembly acts as an electrical interlock between valve and pump and releases the pump starter so the pump stops. It uses line pressure for operation, and opening and closing rates are adjusted separately.

Technical specifications

Built-in check and power-failure behaviour

The 60-11 is based on the 100-03 Powercheck main valve, which contains a lift-type check valve. Should a power failure occur, the check closes the moment flow stops and prevents reverse flow, regardless of the solenoid or diaphragm position. For best performance of the built-in check, install the valve with the stem vertically up; for a horizontal stem, Cla-Val points to the 60-73, or the 660-73 where a reduced-port valve is needed.

The datasheet recommends a 52-03 Surge Anticipator (652-03 for reduced port) for power-failure protection and the 60-11 data lists the pilot components: CV flow controls, a CSM11-A2-2 solenoid control, an X105LCW switch assembly and a CVS-1 shuttle valve. Flexible conduit should be used for the solenoid and limit switch wiring.

Solenoid, control panel and sizing

The CSM11 solenoid has a general purpose NEMA Type 3 aluminum enclosure with a stainless steel trim, a molded Class A coil and a maximum pressure of 300 psi. At 120 V 60 Hz the datasheet gives 0.575 A holding, 5.1 A inrush and 14.1 ohm coil resistance; other coil voltages from 24 to 440 V (60 Hz) and 110 to 240 V (50 Hz) are tabulated. The manual operation of the solenoid is possible.

For SCADA integration and alarms Cla-Val offers the PC-22D Electronic Pump Control Panel, which sequences the pump and valve through all operating modes. Suggested maximum flow is 300 gpm at 2-1/2 in, 460 gpm at 3 in, 800 gpm at 4 in, 1,800 gpm at 6 in and 3,100 gpm at 8 in. Do not oversize the valve, because that weakens its surge-prevention action. Larger pumps use the Cla-Val 60-19 high capacity version.

How the Cla-Val 60-11 works

The valve sits on the pump discharge. Line pressure acts on a diaphragm in the main valve, and a pilot system sets how it moves. At start the pump runs against a closed valve. The solenoid then lets the valve open slowly, so pressure rises smoothly. At stop the valve closes slowly while the pump still runs.

Where the 60-11 is used

• Booster pump stations
• Water transmission lines
• Pump discharge lines
• Distribution systems with surge risk
• Pump stations with remote start and stop

Selection checklist for the 60-11

• Valve size
• Globe or angle pattern
• Body material
• Pressure class
• Solenoid voltage
• Flow rate range
• Opening and closing time
• Pump control panel

Installation, commissioning and maintenance notes for the 60-11

Install the valve on the pump discharge with the stem vertical for best check performance. Connect the solenoid and the limit switch to the pump starter. Set the opening and closing rates with the flow controls. Test a full start and stop. Clean the pilot strainer at regular intervals.

Requesting a quotation for the Cla-Val 60-11

Please send the valve size, the flow, the pressure and the solenoid voltage. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

60-11 sizes

Sizes run from 2-1/2 to 8 in, or 65 to 200 mm.

60-11 patterns

Globe and angle patterns are listed.

60-11 body materials

Materials are ductile iron, cast steel and bronze.

60-11 pressure ratings

Ductile iron is rated 250 psi in the 150 class.

60-11 main valve

It is based on the 100-03 Powercheck main valve.

60-11 built-in check

A lift-type check closes when flow stops and prevents reverse flow.

60-11 solenoid

The solenoid enclosure is NEMA Type 3 aluminum.

60-11 coil power

The AC coil draws 15.4 W.

60-11 limit switch

A limit switch releases the pump starter when the valve is closed.

60-11 temperature

It handles water up to 180 degrees F.

60-11 flow rates

The suggested maximum flow runs from 300 gpm at 2-1/2 in to 3,100 gpm at 8 in.

Valve records for the 60-11

Record the opening and closing times, the pump pressure and the date of each test.

Choosing the right 60-11 size

Choose the size from the flow of the pump, and check it sits within the suggested flow band.

Documents and quotation

The engineering data sheet E-60-11 (metric edition) is attached. To order a 60-11 specify valve size, pattern, pressure class, trim material, electrical selection (coil voltage and enclosure), options and whether it is installed vertically. See also the Cla-Val 81-02 pump check valve and other valves under Control Valves.