01925 225252

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
SizeABCDEWt
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 up15001950 2050 22002400 2600 2700 2800

Hot Running Load
70
80
85
90
100
105
110
110
3/4"Cold start up1500 19502050220024002600 2700 2800

Hot Running Load
70
80
85
90
100
105
110
110