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4047 Pressure Valve
Model 4047 is used as a 2-Way or 3-Way high capacity, low-pressure valve for settings from 0.1 psi falling to 11.2 psi rising over several ranges. Applications include sensing low-pressure gas, water, fuel, oil, or for liquid level sensing and control. By piping to the vacuum port, the valve can be used to sense vacuum pressure from 0.1 psi falling. The 4047 can detect overload on gas engines by sensing the vacuum pressure in the intake manifold.
Features and Benefits
- 3-Way Valve has balanced force design
- Pressure can be applied at any port
- Buna N Tadpole seals are easily replaced
- Bubble-tight seals with Center Dead Spot - no port overlap
- Gulfproofing standard
Specifications
| Valve body and housing: | Gulfproofed aluminum | |
| Valve spool: | Anodized aluminum | |
| Standard seals and diaphragm: | Buna N/Nitrile | |
| Max. operating pressures ports 1,2, and 3 | 860 kPa | 125 psi |
| Max. countinuous diaphragm control pressure: | 138 kPa | 20 psi |
| Proof pressure - diaphragm | 207 kPa | 30 psi |
| Max. temperature: | 66°C | 150°F |
| Valve free flow area: | Kv = 1.0 | Cv = 1.2 |
| Net weight: | 2.26 kg | 5 lbs |
Applications
- Sense low pressure or vacuum of water, air, natural gas, oil and more...
- Detection of overload on gas engines
- Sensing of vacuum in intake air manifold
Operation
2-Way Valve to open on rising pressure
Port 1 must be plugged. Rising pressure will open
Port 2 to Port 3 above the trip point.
Valve to open on falling pressure
Port 3 must be plugged. Falling pressure will open
Port 2 to Port 1 below the set trip point.
3-Way Valve operation for 3-Way action is identical with that for 2-Way except that there will be no plugged ports. On valves set to trip on rising pressure, Port 1 will open to Port 2 until just below the trip point. Port 3 will open to Port 2 at the trip point. On falling pressure, Port 3 will close first. Then Port 1 will open to Port 2.
AMOT Model 4047 has a “dead spot” in the exact center position, which prevents the overlapping of Ports 1 and 3. Because of this, Ports 1 and 3 will not open and close simultaneously at the trip point.