Series 110 - Differential Control Valves

• 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.

• Model 110 Differential Pressure Control Valve
• Model 111 Differential Pressure Control Valve
• Model 101-D Differential On-Off Valve

Valve Features 

• Operates automatically off line pressure.
• Heavy-duty, nylon-reinforced diaphragm.
• Rectangular-shaped, soft seat seal provides drip-tight Class VI closure.
• Diaphragm assembly Guided top and bottom.
• Throttling seat retainer for flow and pressure stability.
• Easily maintained without removal from the line.
• Replaceable seat ring.
• Alignment pins assure proper reassembly after maintenance.
• Valves are factory tested.
• Valves are serial numbered and registered to facilitate replacement parts and factory support.

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.

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.

Valve Operation

• Maintains a constant differential pressure between two points in a system.
• Valve opens on increased differential.

THE OCV MODEL 110

The Model 110 consists of the following components, arranged as shown on the schematic diagram:

1. Model 65 Basic Control Valve, a hydraulically-operated, diaphragm-actuated, globe or angle valve which 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 open.
3. Model 126 Ejector, a simple “tee” fitting with a fixed orifice in its inlet 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 Flow Control Valve-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).