Bi-Metallic | Steam Traps | Watson McDaniel

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Bi-Metallic

Bi-Metallic Steam Trap

The WPN Series Bi-Metallic Steam Traps are used in steam tracing, steam main drips and non-critical process equipment. They can be used with superheated steam or on outdoor applications that are subject to freezing. The WPN Series Traps are available in multiple sizes and pressures up to 2,260 PSI.

Model	Body Material	PMO (PSIG)	Sizes	Connections	Pressure Controller	Max Diff. Pressure (PSI)
WPN-40	A105 Carbon Steel	470	1/2" - 2"	NPT, 150# or 300# FLG, SW, BW	R22	320
WPN-40	A105 Carbon Steel	470	1/2" - 2"	NPT, 150# or 300# FLG, SW, BW	R32	460
WPN-63	A182-F12CL2 Alloy Steel	823	1/2", 3/4", 1"	NPT, 300# FLG, SW, BW	R56	810
WPN-100	A182-F12CL2 Alloy Steel	1220	1/2", 3/4", 1"	NPT, 600# FLG, SW, BW	R90	1200
WPN-160	A182-F12CL2 Alloy Steel	1620	1/2", 3/4", 1"	NPT, 900# FLG, SW, BW	R130	1600
WPN-250	A182-F12CL2 Alloy Steel	2260	1/2", 3/4", 1"	NPT, 1500# FLG, SW, BW	R150	2230

How It Works: WPN Series

When the system is cold, the trap is fully open; discharging air and cold condensate. When the bi-metallic plates inside the trap heat up, they expand; pulling the seat closed and restricting Flow. Prior to steam temperature being reached, the trap shuts off tightly. Cooler temperatures cause the seat to open further. Therefore, trap capacity will increase when colder condensate is in contact with the Bi-metal element. Trap capacity is therefore given at different temperatures below saturated steam temperature.

How To Size: WPN Series

The capacity charts show the maximum flow at factory setting.
Curve Flow of Condensate at approx. 18 & 27 °F below boiling temperature.
Curve Flow of Sub-Cooled Condensate at approx. 54°F below boiling temperature. (through back up of condensate)
Curve Flow of Cold Condensate at about 68°F (during start-up of a cold system).
Cooler temperatures cause the seat in the controller to open wider; therefore, trap capacity will increase when colder condensate is in contact with the Bi-metal element. Trap capacity is given at different temperatures below saturated steam temperature.

WPN 40 Series

WPN 63 Series

WPN 100 Series

WPN 160 Series

WPN 250 Series

WPN-40

DRIP, TRACING: WPN-40 series are available in sizes 1/2" - 2" and pressure up to 470 psig. They offer 2 different pressure controllers; max diff. pressure up to 320psi (R22) and up to 460psi (R32), respectively. They are extremely robust and reliable, making them a suitable choice for superheated steam, high pressure applications, as well as outdoor applications that are subject to freezing.

Model	Size	Type	Max PMO (psig)	Strainer Type
WPN40-A-R22-12-F150-ES	1/2"	150# FLG	319	External
WPN40-A-R22-13-F150-ES	3/4"	150# FLG	319	External
WPN40-A-R22-13-N-ES	3/4"	NPT	319	External
WPN40-A-R22-13-SW-IS	3/4"	Socket Weld	319	Internal
WPN40-A-R22-14-F300-ES	1"	300# FLG	319	External
WPN40-A-R22-14-N-ES	1"	NPT	319	External
WPN40-A-R22-14-SW-IS	1"	Socket Weld	319	Internal
WPN40-A-R22-17-BW-ES	2"	Butt Weld	319	External
WPN40-A-R22-17-F300-ES	2"	300# FLG	319	External
WPN40-A-R22-17-SW-ES	2"	Socket Weld	319	External
WPN40-A-R32-12-BW-ES	1/2"	Butt Weld	464	External
WPN40-A-R32-12-F150-ES	1/2"	150# FLG	464	External
WPN40-A-R32-13-F300-IS	3/4"	300# FLG	464	Internal
WPN40-A-R32-13-N-IS	3/4"	NPT	464	Internal
WPN40-A-R32-14-N-IS	1"	NPT	464	Internal
WPN40-A-R22-12-F150-IS	1/2"	150# FLG	319	Internal
WPN40-A-R22-12-F300-ES	1/2"	300# FLG	319	External
WPN40-A-R22-14-F300-IS	1"	300# FLG	319	Internal
WPN40-A-R22-16-F150-IS	1 1/2"	150# FLG	319	Internal
WPN40-A-R22-17-F150-ES	2"	150# FLG	319	External
WPN40-A-R32-12-SW-ES	1/2"	Socket Weld	464	External
WPN40-A-R32-12-SW-IS	1/2"	Socket Weld	464	Internal
WPN40-A-R32-13-F150-ES	3/4"	150# FLG	464	External
WPN40-A-R32-14-F150-IS	1"	150# FLG	464	Internal
WPN40-A-R32-14-F300-IS	1"	300# FLG	464	Internal
WPN40-A-R32-16-F150-ES	1 1/2"	150# FLG	464	External
WPN40-A-R32-16-F150-IS	1 1/2"	150# FLG	464	Internal
WPN40-A-R32-16-F300-ES	1 1/2"	300# FLG	464	External
WPN40-A-R32-16-F300-IS	1 1/2"	300# FLG	464	Internal
WPN40-A-R32-16-N-ES	1 1/2"	NPT	464	External
WPN40-A-R32-16-N-IS	1 1/2"	NPT	464	Internal
WPN40-A-R32-17-SW-ES	2"	Socket Weld	464	External
WPN40-A-R22-12-BW-ES	1/2"	Butt Weld	319	External
WPN40-A-R22-12-F300-IS	1/2"	300# FLG	319	Internal
WPN40-A-R22-12-SW-ES	1/2"	Socket Weld	319	External
WPN40-A-R22-12-SW-IS	1/2"	Socket Weld	319	Internal
WPN40-A-R22-13-BW-ES	3/4"	Butt Weld	319	External
WPN40-A-R22-13-F150-IS	3/4"	150# FLG	319	Internal
WPN40-A-R22-13-F300-ES	3/4"	300# FLG	319	External
WPN40-A-R22-13-F300-IS	3/4"	300# FLG	319	Internal
WPN40-A-R22-13-SW-ES	3/4"	Socket Weld	319	External
WPN40-A-R22-14-BW-ES	1"	Butt Weld	319	External
WPN40-A-R22-14-F150-ES	1"	150# FLG	319	External
WPN40-A-R22-14-F150-IS	1"	150# FLG	319	Internal
WPN40-A-R22-14-N-IS	1"	NPT	319	Internal
WPN40-A-R22-16-F150-ES	1 1/2"	150# FLG	319	External
WPN40-A-R22-16-N-IS	1 1/2"	NPT	319	Internal
WPN40-A-R22-16-SW-ES	1 1/2"	Socket Weld	319	External
WPN40-A-R22-17-N-ES	2"	NPT	319	External
WPN40-A-R32-12-F150-IS	1/2"	150# FLG	464	Internal
WPN40-A-R32-12-N-ES	1/2"	NPT	464	External
WPN40-A-R32-12-N-IS	1/2"	NPT	464	Internal
WPN40-A-R32-13-BW-ES	3/4"	Butt Weld	464	External
WPN40-A-R32-13-F150-IS	3/4"	150# FLG	464	Internal
WPN40-A-R32-13-F300-ES	3/4"	300# FLG	464	External
WPN40-A-R32-13-N-ES	3/4"	NPT	464	External
WPN40-A-R32-13-SW-IS	3/4"	Socket Weld	464	Internal
WPN40-A-R32-14-BW-ES	1"	Butt Weld	464	External
WPN40-A-R32-14-F150-ES	1"	150# FLG	464	External
WPN40-A-R32-14-F300-ES	1"	300# FLG	464	External
WPN40-A-R32-14-SW-ES	1"	Socket Weld	464	External
WPN40-A-R32-16-SW-ES	1 1/2"	Socket Weld	464	External
WPN40-A-R32-17-BW-ES	2"	Butt Weld	464	External
WPN40-A-R32-17-F150-ES	2"	150# FLG	464	External
WPN40-A-R22-12-N-ES	1/2"	NPT	319	External
WPN40-A-R22-12-N-IS	1/2"	NPT	319	Internal
WPN40-A-R22-13-N-IS	3/4"	NPT	319	Internal
WPN40-A-R22-14-SW-ES	1"	Socket Weld	319	External
WPN40-A-R22-16-BW-ES	1 1/2"	Butt Weld	319	External
WPN40-A-R22-16-F300-ES	1 1/2"	300# FLG	319	External
WPN40-A-R22-16-F300-IS	1 1/2"	300# FLG	319	Internal
WPN40-A-R22-16-N-ES	1 1/2"	NPT	319	External
WPN40-A-R22-16-SW-IS	1 1/2"	Socket Weld	319	Internal
WPN40-A-R32-12-F300-ES	1/2"	300# FLG	464	External
WPN40-A-R32-12-F300-IS	1/2"	300# FLG	464	Internal
WPN40-A-R32-13-SW-ES	3/4"	Socket Weld	464	External
WPN40-A-R32-14-N-ES	1"	NPT	464	External
WPN40-A-R32-14-SW-IS	1"	Socket Weld	464	Internal
WPN40-A-R32-16-BW-ES	1 1/2"	Butt Weld	464	External
WPN40-A-R32-16-SW-IS	1 1/2"	Socket Weld	464	Internal
WPN40-A-R32-17-F300-ES	2"	300# FLG	464	External
WPN40-A-R32-17-N-ES	2"	NPT	464	External

WPN-63

DRIP, TRACING: WPN-63 series are available in sizes 1/2" - 1" and pressure up to 823 psig. Also the max diff. pressure up to 810 psi. They are extremely robust and reliable, making them a suitable choice for superheated steam, high pressure applications, as well as outdoor applications that are subject to freezing.

Model	Size	Type	Max PMO (psig)	Strainer Type
WPN63-C-R56-12-BW	1/2"	Butt Weld	812	Internal
WPN63-C-R56-13-BW	3/4"	Butt Weld	812	Internal
WPN63-C-R56-14-SW	1"	Socket Weld	812	Internal
WPN63-C-R56-12-F300	1/2"	300# FLG	812	Internal
WPN63-C-R56-12-SW	1/2"	Socket Weld	812	Internal
WPN63-C-R56-13-F300	3/4"	300# FLG	812	Internal
WPN63-C-R56-14-BW	1"	Butt Weld	812	Internal
WPN63-C-R56-14-F300	1"	300# FLG	812	Internal
WPN63-C-R56-13-SW	3/4"	Socket Weld	812	Internal

WPN-100

DRIP, TRACING: WPN-100 series are available in sizes 1/2" - 1" and pressure up to 1220 psig. Also the max diff. pressure up to 1200 psi. They are extremely robust and reliable, making them a suitable choice for superheated steam, high pressure applications, as well as outdoor applications that are subject to freezing.

Model	Size	Type	Max PMO (psig)	Strainer Type
WPN100-C-R90-13-F600	3/4"	600# FLG	1305	Internal
WPN100-C-R90-12-SW	1/2"	Socket Weld	1305	Internal
WPN100-C-R90-14-F600	1"	600# FLG	1305	Internal
WPN100-C-R90-14-SW	1"	Socket Weld	1305	Internal
WPN100-C-R90-12-F600	1/2"	600# FLG	1305	Internal
WPN100-C-R90-13-BW	3/4"	Butt Weld	1305	Internal
WPN100-C-R90-13-SW	3/4"	Socket Weld	1305	Internal
WPN100-C-R90-14-BW	1"	Butt Weld	1305	Internal
WPN100-C-R90-12-BW	1/2"	Butt Weld	1305	Internal

WPN-160

DRIP, TRACING: WPN-160 series are available in sizes 1/2" - 1" and pressure up to 1620 psig. Also the max diff. pressure up to 1600 psi. They are extremely robust and reliable, making them a suitable choice forsuperheated steam, high pressure applications, as well as outdoor applications that are subject to freezing.

Model	Size	Type	Max PMO (psig)	Strainer Type
WPN160-C-R130-13-BW	3/4"	Butt Weld	1595	Internal
WPN160-C-R130-14-SW	1"	Socket Weld	1595	Internal
WPN160-C-R130-12-BW	1/2"	Butt Weld	1595	Internal
WPN160-C-R130-13-SW	3/4"	Socket Weld	1595	Internal
WPN160-C-R130-14-BW	1"	Butt Weld	1595	Internal
WPN160-C-R130-12-SW	1/2"	Socket Weld	1595	Internal
WPN160-C-R130-13-F900	3/4"	900# FLG	1595	Internal

WPN-250

DRIP, TRACING: WPN-250 series are available in sizes 1/2" - 1" and pressure up to 2260 psig. Also the max diff. pressure up to 2230 psi. They are extremely robust and reliable, making them a suitable choice for superheated steam, high pressure applications, as well as outdoor applications that are subject to freezing.

Model	Size	Type	Max PMO (psig)	Strainer Type
WPN250-C-R150-13-SW	3/4"	Socket Weld	2233	Internal
WPN250-C-R150-14-BW	1"	Butt Weld	2233	Internal
WPN250-C-R150-12-BW	1/2"	Butt Weld	2233	Internal
WPN250-C-R150-13-F1500	3/4"	1500# FLG	2233	Internal
WPN250-C-R150-12-F1500	1/2"	1500# FLG	2233	Internal
WPN250-C-R150-12-SW	1/2"	Socket Weld	2233	Internal
WPN250-C-R150-13-BW	3/4"	Butt Weld	2233	Internal
WPN250-C-R150-14-SW	1"	Socket Weld	2233	Internal
WPN250-C-R150-14-F1500	1"	1500# FLG	2233	Internal
WPN250-C-R150-13-SW	3/4"	Socket Weld	2233	Internal

Universal UB450

DRIP, TRACER: The UB450 Bi-Metallic Steam Trap Module are used in steam tracing applications (fro process line heating, instrumentation and winterization, general steam jacketing ). In tracing applications, the externally - adjustable ( temperature adjustment) bi-metal element provides accurate control of condensate discharge temperature as required to maintain a specific product temperature as well provide maximum usage of energy.

Model	Size	Type	Max PMO (psig)	Max Capacity @ Max PMO (lb/h)	Strainer Type
Click on link above

Temperature

Inlet Pressure
Discharge Pressure
Min. Δ Pressure

Condensate Load
Fill Head
Motive Source