Control Products 110-12 User Manual

The Series 110 Differential Control Valve is designed to accurately

control the pressure difference between any two points. In

some systems this means the valve remains closed until

pressure differential commands its opening. It is a pilot-

operated, modulating type valve which controls pressure

accurately and consistently at the desired setting.

Global performance. P ersonal touch.

TOLL FREE 1.888.628.8258 z phone: [phone] z fax: [phone] z 7400 East 42nd Place, Tulsa, OK 74145

email: [e-mail] z website: www.controlvalves.com

Differential Control Valve Series 110

Differential Control Valve Series 110

SERIES FEATURES

XOperates automatically off

line pressure.

XHeavy-duty, nylon-reinforced

diaphragm.

XRectangular-shaped, soft

seat seal provides drip-tight
Class VI closure.

XDiaphragm assembly

guided top and bottom.

XThrottling seat retainer for

flow and pressure stability.

XEasily maintained without

removal from the line.

XReplaceable seat ring.

XAlignment pins assure

proper reassembly after
maintenance.

XValves are factory tested.

XValves are serial numbered

and registered to facilitate
replacement parts and
factory support.

VALVE FEATURES

XOpens on increasing differential.

XDual pilot sense lines can be valve or remote

connected.

XDifferential is adjustable over complete range of

control springs. (see pilot features)

SModel 110 shown

FILTER BYPASS CONTROL

In a filtered liquid application where loss of flow cannot be tolerated, the model 110 allows
flow should the filter become clogged.

PUMP DIFFERENTIAL CONTROL

Installed on the discharge side of a pump, the valve senses high pressure at pump discharge
(valve inlet) and low pressure at the pump suction. Valve modulates to hold differential
pressure constant, thus assuring pump is at optimum point on its curve.

Global performance. P ersonal touch.

TOLL FREE 1.888.628.8258 z phone: [phone] z fax: [phone] z 7400 East 42nd Place, Tulsa, Oklahoma 74145

email: [e-mail] z website: www.controlvalves.com

VALVE OPERATION

Differential Control Valve Series 110

The OCV MODEL 110

XMaintains a constant differential pressure between two points in a system.
XValve opens on increased differential.

1) Model 65 Basic Control Valve, a hydraulically-operated, diaphragm-actuated
globe or angle valve that closes with an elastomer-on-metal seal.

2) Model 1356 Differential Pilot, a two-way, normally closed pilot valve that senses
differential pressure across its diaphragm and balances it against an adjustable
spring load. An increase in differential above the set point makes the pilot open.

3) Model 126 Ejector, a simple "tee" fitting with a fixed orifice in its upstream port.
It provides the proper pressure to the diaphragm chamber of the main valve,
depending on the position of the differential pilot.

4) Model 141-2 Needle Valve that controls the opening/closing speed of the main
valve.

5) Model 159 Y-Strainer (standard on water service valves), the strainer protects
the pilot system from solid contaminants in the line fluid.

6) Model 141-4 Ball Valves (standard on water service valves, optional on fuel
service valves), useful for isolating the pilot system for maintenance or
troubleshooting.

7) Model 155 Visual Indicator (optional)

PILOT

1356

XAccurate sensing of high and low pressure. XRubber-to-metal seat provides positive closure until required to open.
XNormally closed, pressure differential to open. XLarge area diaphragm for quick, precise control.
XSimple, single adjustment of differential set point. XBronze or stainless steel construction.
XAll parts replaceable while mounted on the valve. XMultiple spring ranges.

The Model 1356 Differential
Pressure Pilot controls the
amount of pressure in the upper
chamber of the main valve
(hence, the degree of opening
or closing of the main valve).
The pilot senses high pressure
under its diaphragm and low
pressure above its diaphragm.
As the differential increases
above the setting of the spring
(adjustable), the pilot opens,
decreasing the pressure in the
main valve diaphragm chamber,
allowing the main valve to open
a proportionate amount.

Sense line locations.
High pressure sensing is
typically at the main valve inlet.
Low pressure can be sensed at
the valve outlet or at a field
installed remote location.

Pilot Materials
Bronze B-61
Stainless Steel ASTM A743/CF8M
Spring Ranges
5-30, 20-80, 65-180 psi

SIZING DIFFERENTIAL CONTROL VALVES

Because the Model 110 typically controls the differential pressure, that particular parameter of the sizing equation is already defined. All that
remains is to ensure the valve is large enough to handle the required flow within proper velocity limits.

where: Cv = valve coefficient

Q = Maximum flow rate, gpm
sg = Liquid specific gravity (water = 1.0)
dp = Differential pressure, psig

From the chart below, pick the smallest valve that has a Cv at least equal to the value calculated and where the velocity does not exceed 25 ft/sec.

TOLL FREE 1.888.628.8258 z phone: [phone] z fax: [phone] z 7400 East 42nd Place, Tulsa, Oklahoma 74145

email: [e-mail] z website: www.controlvalves.com

Global performance. P ersonal touch.

Differential Control Valve Series 110

sgDP

Q

C

V

max

=

SIZING CONSIDERATIONS

SIZE CV CV FLOW @

(GLOBE) (ANGLE) 25 FT/SEC (GPM)
1 ¼ 23 30 115
1 ½ 27 35 150
2 47 65 260
2 ½ 68 87 370
3 120 160 570
4 200 270 1000
6 450 550 2250
8 760 1000 3900
10 1250 1600 6150
12 1940 2400 8700
14 2200 -- 10,500
16 2850 4000 13,800

24 6900 -- 31,300

Global performance. P ersonal touch.

TOLL FREE 1.888.628.8258 z phone: [phone] z fax: [phone] z 7400 East 42nd Place, Tulsa, OK 74145

email: [e-mail] z website: www.controlvalves.com

Differential Control Valve Series 110

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