Watson McDaniel 3040 Series Relief & Back Pressure Valves (For Water/Air/Oil/Liquid), Stainless Steel Body, 1 - 125 PSIG, Viton Trim, 2" 300# Flange
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Request a Formal Quote or call 888-825-8800Technical Specifications
General
| Model | 3040 Series |
|---|---|
| Service | Water, Oil, Other Liquids, Air |
| Sizes | 2" |
| Diaphragm | Viton - 300°F Max |
| Part Number | N/A |
| Brand | Watson McDaniel |
| Manufacturer Part # | WM-3040-F300-4321-V |
| Country of Origin | Made in the United States |
Materials & Construction
| Body Material | Stainless Steel |
|---|---|
| Seat Material | Stainless Steel |
| Disc Material | Viton - 300°F Max |
Performance
| Max Inlet Pressure | 250 PSIG |
|---|---|
| Design Pressure/Temperature Rating – PMA/TMA | NPT 300 PSIG @ 200°F Max |
Connections
| Connections | NPT, Flanged (2" Only) |
|---|
Overview
Watson McDaniel 3040 Series Relief & Back Pressure Regulating Valves, 1 - 125 PSIG For Water/Air/Oil/Liquid (2" 300# Flange)
Features:
- Fast Response
- Viton Trim For 300°F Service
- Soft “Seat” For Tight Shut-Off
Options & Features (See Specification Sheet For Full List):
3040 Back Pressure Relief Valves (For Water/Air/Oil/Liquid)
Water, Liquid, Air: The 3040 Back Pressure Relief Valve offers a much higher capacity than the R Series. Used for Liquid service. Relief Valves protect systems from over-pressurized conditions. Also used for pump protection. The R Series are economically-priced Back Pressure Relief Valves for Liquid service. Relief Valves/Back Pressure Valves are used to maintain a specific back pressure or to protect systems from an over-pressure condition. Also used for pump protection.
The 3040 Series Back Pressure Valves relieve upstream pressure in a variety of processes. Automatically maintains desired maximum pressure in a vessel or system by relieving excess pressure into lower pressure return line or to atmosphere. Ideally suited for use as pump bypass control valve by maintaining constant pump discharge pressures. Used as a continuously operating valve or for intermittent protection against over-pressure conditions.
How It Works
The 3040 Series Back Pressure Valve senses upstream pressure acting on the under side of the diaphragm through a port in the bottom diaphragm case. An in crease in the up stream pressure above the set point will compress the spring and allow the valve to open. The spring will close the valve as the upstream pressure decreases to the set-point.
The higher the system pressurizes above the relief set-point pressure, the more flow the valve will pass. It is therefore typical to specify the maximum capacity of a back pressure relief valve at 10% & 20% over set-pressure.
Pressure Adjustments:
Rotating the adjustment screw clockwise increases the compression on the spring, thereby in creasing the set-pressure. Rotating the adjustment screw counter-clockwise lowers the set-pressure. Tighten the locknut after adjustment.
Selection / Sizing / Capacities
The Relief Valve remains closed until the Set-Pressure is reached. When the Set-Pressure is met or exceeded, the spring will compress, allowing the valve to open and flow to occur. It is standard practice to publish flow values at 10% and 20% over the Set-Pressure.
Example:
- A 1” valve set at 50 PSIG will pass 35.6 GPM of water or 409 SCFM of air if the system pressure exceeds the set-point by 20%. The 3040 Series Relief Valve water and air capacities at inlet pressures of 10% and 20% over Set-Pressure.