Watson McDaniel’s WLD1703S series of thermodynamic liquid drainers offers a flexible cycling operation, high mechanical durability, and superior freeze resistance for compressed air systems, industrial gas lines, and main pipelines.

 

 

 

 

 

 

 

 

 

 

 

 

Key features of the WLD1703S series:

Premium stainless steel construction: The entire body and internal components are made of stainless steel, maximizing corrosion resistance and extending pressure and temperature limits compared to conventional materials.

Superior precision and efficiency: Utilizing a thermodynamic operating principle with a three-holed balanced discharge design, the unit effectively controls and drains liquid while preventing the loss of gas or compressed air.

Integrated strainer and optional blowdown valve: The design includes a built-in strainer and an optional blowdown valve, providing optimal protection for sealing surfaces and the valve disc against pipeline impurities and rust.

Hardened disc and seat: Internal working components—specifically the disc and seat—are hardened for exceptional wear resistance, ensuring a tight seal meeting industrial standards even under continuous, harsh operating conditions.

Versatility and ease of installation: The design allows for operation and installation in any orientation (though horizontal installation is preferred) without the need for complex balance piping, thereby optimizing maintenance time and effort.

Wide operating range and freeze-proof design: Suitable for condensate drainage applications on main air or gas lines; offers excellent freeze-proof performance when installed vertically (downward flow) and operates reliably across a pressure range of up to 250 PSIG.

 

Type:                                                   WLD1703S

Size:                                                    1/2"

Connection:                                        NPT

Body material:                                   Stainless steel

Option:                                                Blow-down valve

Maximum working pressure:          250 PSI

Maximum working temperature:    398˚C

Maximum allowable pressure:       915 PSIG up to 121˚C

Maximum allowable temperature: 321˚C @ 750 PSIG

 

How It Works:

The disc type liquid drain trap has a cyclic on/off operation with a disc that is pushed open when condensate is present and pulled closed when air or gas tries to escape.

 

Sample Specification:

Drain Trap shall be a Disc Type with an all stainless steel construction. Body shall have a built-in strainer with optional blowdown valve. Integral seat design and disc to be hardened for long service life. Unit shall be capable of installation in any orientation and self-draining when mounted vertically with flow direction downwards.

 

Installation:

Drain Trap can be installed in any position, however, horizontal is preferred. Installation should include isolation valves for maintenance purposes.

 

 

TL Plus Engineering specializes in providing comprehensive solutions for saturated steam systems, covering everything from heating system calculations and piping and valve selection—tailored to specific temperature and pressure control applications—to ensuring safe and efficient system operation. The company also develops solutions to calculate and minimize energy losses in saturated steam systems.

Application of the Watson McDaniel WLD1703S Drain Trap for Saturated Steam Systems.

 

TL Plus Engineering serves as the exclusive distributor and developer for Watson McDaniel’s US-manufactured valve product lines in the Vietnamese market.