DIAPHRAGM AUTOMATIC CONTROL VALVES SERIES 879

Control valves series 879 can help reduce water losses and contribute to efficient water supply management. With the help of the control pilots assembled on the hydraulic valve circuits, the hydraulic regulation valves ensure the monitoring of the pressure, the flow, the levels and the pumping stations, regardless of changes in the supply network.

AVK diaphragm operated control valves are designed to provide network stability, accurate regulation, easy maintenance and long durability.

AVK control valves are available in DN50-600, with reduced and with full bore. Control valves with reduced bore are appropriate for most applications, as the smaller bore often offers more accurate regulation. Control valves with full bore are recommended, if high Kv values are needed, e.g. in front of hydrants.

The body and bonnet are made of ductile iron with fusion bonded GSK approved epoxy coating. All non-coated internals are of stainless steel AISI 304.

The diaphragm is manufactured by AVK GUMMI and made of drinking water approved EPDM rubber with polyamide reinforcement.

Parabolic plug design provides precise regulation and stability at low flow. Furthermore, it reduces noise and vibration.

FEATURES

  • DN 50÷600
  • PN 10-16
  • Designed according to EN 1074-1 e EN 1074-5
  • Face to face according to EN 558 S1
  • Standard flange drilling to EN 1092-2
  • Test according to EN 12266-1

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FUNCTIONS

Downstream pressure reducing valve

ACMO S879 M100 diaphragm operated control valve for pressure reducing applications (PRV) automatically reduces a higher inlet pressure to a lower outlet pressure. The outlet pressure is kept constant, regardless of changes in flow or
inlet pressure. The main control valve is pilot operated, capable of precise setting and easy adjustment of outlet pressure.

Find out features about the function

AVK DATASHEET:
879/000X99-001 Reduce bore
879/100X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M100

GA DRAWING:
ACMO-AVK_GA_879-M100

Dual stage day/night and solenoid control

ACMO S879 M117 diaphragm operated control valve for pressure reducing applications (PRV) automatically reduces a higher inlet pressure to two lower outlet pressures according to the time of the day. The outlet pressures are kept constant, regardless of changes in flow or inlet pressure. The main control valve is operated by two pilots, capable of precise setting and easy adjustment of outlet pressure. The switch between pilots is managed by the controller (timer).

Find out features about the function

AVK DATASHEET:
879/000X0X-001 Reduce bore
879/100X0X-001 Full bore

IOM:
ACMO-AVK_IOM_879-M117PRG

GA DRAWING:
ACMO-AVK_GA_879-M117PRG

Pressure reducing and sustaining

ACMO S879 M120 is an automatic control valve specifically designed to maintain downstream pressure constant at a defined value and sustain a minimum upstream pressure and/or discharge the exceeding pressure downstream. Independently from the pipeline pressure variations or variations in the water demand. Pilot valves detect the upstream/downstream pressure and determine the main valve how to modulate. The main valve keeps the inlet/outlet pressure constant. Pilot valves are provided with adjustable screw to pre-select the desired pressure.

AVK DATASHEET:
879/000X91X-001 Reduce bore
879/100X1X-001 Full bore

IOM:
ACMO-AVK_IOM_879-M120

GA DRAWING:
ACMO-AVK_GA_879-M120

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Upstream pressure sustaining valve

ACMO S879 M200 diaphragm operated control valve for pressure sustaining applications (PSV) automatically sustains a minimum pre-set inlet pressure, regardless of changes in flow rate or outlet pressure, to prevent of robbing
of pressure in upper zone. It is usually installed in a line between an upper zone and a lower area of heavy demand or tank. The main control valve is pilot operated, capable of precise setting and easy adjustment of inlet pressure.

Find out features about the function

AVK DATASHEET:
879/001X99-001 Reduce bore
879/101X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M200

GA DRAWING:
ACMO-AVK_GA_879-M200

Pressure relief valve

ACMO S879 M300 diaphragm operated control valve for pressure relief applications, automatically, discharges excess pressure above a pre-selected value, to prevent overpressure. The main control valve is pilot operated, capable of precise setting and easy adjustment of inlet pressure. It is usually installed on a pipe branching off from the main line.

Find out features about the function

AVK DATASHEET:
879/001X99-001 Reduce bore
879/101X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M300

GA DRAWING:
ACMO-AVK_GA_879-M300

Flow control valve

ACMO S879 M400 diaphragm operated control valve for flow control applications (FCV) automatically prevents excessive flow by limiting flow to a preselected maximum rate, regardless of changes in line pressure. The main control valve is pilot operated, capable of precise setting and easy adjustment of required flow. The valve is supplied with an orifice plate assembly; the pilot control responds to the differential pressure produced across the orifice plate installed downstream of the valve.

Find out features about the function

AVK DATASHEET:
879/002X99-001 Reduce bore
879/102X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M400

GA DRAWING:
ACMO-AVK_GA_879-M400

Flow control valve

The pressure reducing & flow control valve ACMO S879 M410 is an automatic control valve designed to achieve two goals. It maintains constant the downstream target pressure, the downstream target pressure is independent from the pressure variations and water demand of the system downstream the valve. The flow rate is maintained equal or minor to the target flow rate independently from the upstream and downstream system pressure variations. The flow control is achieved maintaining the differential pressure on the calibrated diaphragm constant. The differential pressure acts on the pilot that sets the valve obturator position according to its variations.

AVK DATASHEET:
879/002X7X-001 Reduce bore
879/102X7X-001 Full bore

IOM:
ACMO-AVK_IOM_879-M410

GA DRAWING:
ACMO-AVK_GA_879-M410

Altitude control valve

ACMO S879 M800 diaphragm operated control valve for level control applications with altitude pilot is an automatic control valve that controls reservoir filling and reservoir level without the need for floats or other devices. It is a non-modulating
one-way valve that remains fully open until the shut-off point is reached. The pilot control operates on the differential forces between a spring load and the water level in the reservoir.

Find out features about the function

AVK DATASHEET:
879/003X99-001 Reduce bore
879/103X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M800

GA DRAWING:
ACMO-AVK_GA_879-M800

Modulating float control valve

ACMO S879 M500A diaphragm control valve for level control applications with modulating horizontal float is an automatic control valve that maintains a relatively water level in a reservoir regardless of the varying demand. It can be installed to control the flow into or out of the reservoir. The float control pilot is remotely mounted into the reservoir, connected to the valve cover by the means of a control pipe. The float control moves when the water level changes; this action varies the pressure in the upper control chamber, causing the main valve to throttle and regulate the flow.

Find out features about the function

AVK DATASHEET:
879/005X99-001 Reduce bore
879/105X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M500A

GA DRAWING:
ACMO-AVK_GA_879-M500A

Modulating float control valve

ACMO S879 M500 diaphragm control valve for level control applications with modulating vertical float is an automatic control valve that maintains a constant water level in a reservoir regardless of the varying demand. It can be installed to control the flow into or out of the reservoir. The float control pilot is remotely mounted into the reservoir, connected to the valve cover by the means of a control pipe. The float control moves when the water level changes; this action varies the pressure in the upper control chamber, causing the main valve to throttle and regulate the flow.

Find out features about the function

AVK DATASHEET:
879/005X99-002 Reduce bore
879/105X99-002 Full bore

IOM:
ACMO-AVK_IOM_879-M500

GA DRAWING:
ACMO-AVK_GA_879-M500

Min-max level control float valve

The min-max level control valve is an automatic control valve designed to control the level in a reservoir. The sliding float, which operates on the two-way pilot, allows controlling the min-max level of the reservoir. The main valve closes when the fluid reaches the max. level and opens again when the fluid reaches the min. level. The valve can be closed and opened manually operating on the pilot.

AVK DATASHEET:
879/006X99-001 Reduce bore
879/106X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M600

GA DRAWING:
ACMO-AVK_GA_879-M600

Surge anticipator pressure relief valve

The water-hammer preventig valve is an automatic control valve designed to protect pumping systems from over-pressure waves generated by sudden speed changes that occur when the pumps shut down.
When a sudden abnormal shut down of the pump (e.g. power cut off) occurs downstream from the pump the pressure suddenly drops due to flow inertia and then increases (even highly) above the static pressure (water hammer). The pilot system of the preventing valve uses the initial pressure drop to control the opening of the main valve. In the next stage the pressure increases in the main valve (which is open) and can’t reach excessive values, but the water hammer  reventing valve discharges this excessive pressure into the atmosphere. In the normally functions of pumping system the main valve shuts hermetically and also maintains the relief function with the pressure set parameter (that can be amply adjusted).

AVK DATASHEET:
879/008X99-001 Reduce bore
879/108X99-001 Full bore

IOM:
ACMO-AVK_IOM_879-M305

GA DRAWING:
ACMO-AVK_GA_879-M305

Electronic control valve

ACMO S879 M770 diaphragm control valve is designed for applications where remote control of the valve is preferred. The valve responds to signals received from the controller (preferably ACMO PMD), by changing its opening position by the solenoid pilots.

Find out features about the function

AVK DATASHEET:
879/009X9X-001 Reduce bore
879/109X9X-001 Full bore

IOM:
ACMO-AVK_IOM_879-M770

GA DRAWING:
ACMO-AVK_GA_879-M770

Electronic control valve

Hydraulic control valve is an automatic control valve specifically designed to be implemented through an electrical control. The valve is slaved to a solenoid valve which determines the opening and closing according to the electric command received.

AVK DATASHEET:
879/009X9X-002 Reduce bore
879/109X9X-002 Full bore

IOM:
ACMO-AVK_IOM_879-M700

GA DRAWING:
ACMO-AVK_GA_879-M700