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 |