Series 3330 - Altitude Control Valves

• The elevated tank, standpipe or storage reservoir is a common and important element found in many water distribution systems- municipal, fire protection, commercial, military and industrial.
• The function of the OCV Series 3330 Altitude Control Valve is accurate, automatic level control, without the use of floats or sensors. Pilot controls for the series can accommodate storage facilities up to 230 feet high, maintaining the liquid level to within inches of a predetermined set point.
• The series is offered in two basic types. The Model 3331, one-way flow is used for tank fill only. The Model 3333 allows flow both into and out of the tank.

• Model 3331 One-Way Altitude Valve
• Model 3333 Two-Way Altitude Valve
• Model 3331-4 One-Way Altitude with Delayed Drawdown

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.

ALTITUDE VALVE / ONE WAY FLOW (TANK FILL)

Provides automatic filling of elevated tanks or reservoirs. When the altitude control senses a drop in level below the predetermined set point, the valve opens to fill tank. When the level again reaches the set point, the valve will close. Discharge of the tank is by a separate line.

ALTITUDE VALVE / TWO WAY FLOW (TANK FILL & DISCHARGE)

Controls both the fill and discharge cycles of a tank or reservoir. When valve inlet (system) pressure falls below tank head pressure, the altitude valve opens to feed the system. When system pressure recovers above tank head, the tank begins to refill. When the high level set point is reached, the valve will close.

Valve Operation

3331 (2-8″ DIAGRAM)

MODEL 3331 ONE-WAY FLOW

The 3331 is designed to only fill the tank. Tank head (pressure) is sensed under the diaphragm of the 3300 altitude pilot (2). When the tank head falls below the set point , the pilot shifts to vent water from diaphragm chamber of the main valve (1) to drain. This allows the valve to open and fill the tank. When the tank level again reaches the set point, the altitude pilot shifts to apply full inlet pressure to the diaphragm of the main valve, forcing the valve fully closed.

The 3331 consists of the following components, arranged as shown on the schematic diagram:

1. Model 65 Basic Valve Assembly
2. Model 3300 Altitude Pilot
3. Model 141-2 Needle Valve
4. Model 159 Y-Strainer
5. Two Model 141-4 Ball Valves
6. Model 155 Visual Indicator

3331 (10-24″ DIAGRAM)

TWO-WAY ALTITUDE VALVE

The 3333 is designed to drain and fill the tank. When the inlet (system) pressure falls below the set point of the altitude pilot (2), the pilot shifts to vent water from diaphragm chamber of the main valve (1) to drain. This allows the valve to open and let the tank feed the system. When system pressure recovers to a point higher than tank head, the tank will begin refilling. When the tank level again reaches the set point, the altitude pilot shifts to apply full inlet pressure to the diaphragm of the main valve, forcing the valve fully closed.

The 3333 consists of the following components, arranged as shown on the schematic diagram:

1. Model 65 Basic Valve Assembly
2. Model 3300 Altitude Pilot
3. Model 3600 Three-Way Auxiliary Pilot (10-24″ only)
4. Model 6401 Two-Way Auxiliary Pilot (10-24″ only)
5. Model 141-2 Needle Valve
6. Model 126 Ejector
7. Model 141-1 Check Valve
8. Model 159 Y-Strainer
9. Three Model 141-4 Ball Valves
10. Model 155 Visual Indicator