Models DM25

Gallery

Operation

On initial start up the steam system, large amounts of cold condensate and air are present in the system. At this point the bimetallic strip of the delta element relaxes and fully opens the valve assembly to quickly expel the high volume of non-condensate gases and cold condensate through the discharge port.

As the element senses an increase in the condensate temperature the bimetal expands and raises the stem to modulate the flow. Just below the temperature of saturated steam the seat will close tightly to prevent live steam from discharging.

Application

Bestobell model DM25 is a light performance,energy efficient steam trap that incorporates a ‘Y’ type strainer and integral check valve. It provides long term reliable service on steam main dripleg and critical tracing applications with differential pressures up to 320 PSI.

Description

Max. Differential Pressure – 320 PS

Line sizes

Model DM25 1/2″, 3/4″
End connections threaded (BSP, NPT) socket weld or flanged

Materials

Body & Cover: Forged carbon steel
Valve Seat: Stainless steel
Valve Cone: Stainless steel
Strainer: Stainless steel
Bimetal: Stainless steel
Nuts & Bolts Steel
Gasket: Flexible graphite

Mounting

From horizontal to vertical. Self draining and freeze resistant when mounted in vertical position.

Features

• Single blade element
• Stainless steel internals
• Built in strainer & check valve
• Modulating discharge
• Continuous air & CO2 venting
• Fast start capabilities
• No loss of live steam

Dimentions

Size	A	B	C	D	E	Wt
1/2"	4"	5"	3 1/4"	3 1/4"	2 1/4"	5.5lb
3/4"	4"	5"	31/4"	3 1/4"	2 1/4"	5.5lb

Capacity chart: Condensate Capacity (1b/hr) at Pressure Differential

Size	PSI Differential	50	100	120	150	200	250	300	320
1/2"	Cold start up	1500	1950	2050	2200	2400	2600	2700	2800
	Hot Running Load	70	80	85	90	100	105	110	110
3/4"	Cold start up	1500	1950	2050	2200	2400	2600	2700	2800
	Hot Running Load	70	80	85	90	100	105	110	110