Western Enterprises m24-40 Diss Oxygen Demand Valve

Product Description

The WESTERN ENTERPRISES m24-40 is a Diameter Index Safety System (DISS) oxygen demand valve designed for medical gas applications. It features a 1/8 inch NPT male inlet and a DISS 1240 outlet connection. The valve is engineered so that gas flow is checked without a connection being made — flow only occurs when a proper mating connection is established. This design prevents accidental gas release and ensures system integrity during connection and disconnection. Rated for a maximum pressure of 200 psi, it is suited for use in medical oxygen delivery systems. Licensed medical gas installers and biomedical technicians are the primary installers of this component.

The m24-40 is intended for medical field applications where a secure, indexed oxygen connection is required. The DISS 1240 designation ensures the outlet is specific to oxygen service, preventing cross-connection with other medical gases. At 50 psi supply pressure, the valve delivers a flow rate of 500 scfh, making it appropriate for high-demand oxygen supply points. It is commonly installed at wall outlets, equipment drops, or service panels in medical facilities where oxygen distribution is required.

Key Features

• DISS 1240 outlet — oxygen-specific indexed connection prevents cross-gas misconnection
• Demand-style valve: gas is checked until a proper connection is made, reducing accidental flow
• 1/8 inch NPT male inlet for standard medical gas piping connections
• Flow rate of 500 scfh at 50 psi supply pressure
• Maximum operating pressure of 200 psi
• 9/16 inch thread size at the DISS outlet interface

Compatibility

Designed for use in medical oxygen distribution systems requiring a DISS 1240 demand-style outlet connection with a 1/8 inch NPT male inlet.

Installation Notes

Installation of medical gas components must be performed by qualified medical gas installers in accordance with NFPA 99 and applicable local codes. Shut off and verify the oxygen supply is fully depressurized before removing or installing any valve. Use appropriate thread sealants rated for oxygen service — never use petroleum-based compounds on oxygen fittings. Verify all connections are leak-free before returning the system to service.

Technical Specifications

• Field: Medical
• DISS Designation: 1240
• NPT Inlet Size: 1/8 inches
• Thread Size: 9/16 inches
• Flow Rate at 50 psi: 500 scfh
• Maximum Pressure: 200 psi
• Prop 65 Warning: This product can expose you to lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.

Standard Information

• Brand: WESTERN ENTERPRISES
• Manufacturer Part Number: m24-40