Spirax Sarco SM45 is a maintainable medium-pressure bimetallic steam trap with an alloy steel body and a corrosion-resistant bimetallic and stainless steel thermostatic element. Maximum working pressure is 45 bar g and maximum working temperature is 450°C. Threaded, welded, and various flanged connections are available. It is suitable for condensate removal from process steam tracing circuits, discharging condensate and non-condensable gases at a preset temperature below saturation.
SM45 Bimetallic Steam Trap Product Photo 2
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Spirax Sarco SM45 Medium-Pressure Bimetallic Steam Trap (Repairable Type)
Medium-pressure bimetallic steam trap for condensate removal from process steam tracing circuits, supporting multiple connection types.
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Model confirmation
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After-sales support
After-sales communication support is provided according to the order agreement.
Specifications
- Body Design Pressure
- PN63
- Maximum Allowable Pressure
- 63 bar g at 210°C
- Maximum Allowable Temperature
- 450°C at 45 bar g
- Maximum Operating Pressure
- 45 bar g at 450°C
- Maximum Operating Temperature
- 450°C at 45 bar g
- Minimum Operating Temperature
- 0°C
- Maximum Cold Hydraulic Test Pressure
- Threaded/socket weld/butt weld/flanged PN64: 109 bar g, flanged ANSI 300: 80 bar g, flanged ANSI 600: 109 bar g, flanged JIS/KS 30K: 79 bar g
- Connection Type
- BSP/NPT threaded, butt weld, BS 3799 Class 3000 socket weld, EN1092 PN64 / ASME 300 / JIS KS 30K flanged
- Connection Size
- 1/2", 3/4", 1", 1-1/2" / DN15, DN20, DN25, DN40
- Flow Coefficient
- Kv DN15: 0.25, DN20/DN25/DN40: 0.6 (Cv(UK)=Kv×0.963, Cv(US)=Kv×1.156)
- Body Material
- Alloy steel DIN 17245 CS 22 Mo4
- Cover Material
- Alloy steel DIN 17243 13Cr Mo44 (W/S 1.7335)
- Thermostatic Element Material
- Corrosion-resistant bimetal and stainless steel
- Strainer Material
- Stainless steel ASTM A240 316L
- Valve Plug Material
- Stainless steel BS 970 431 S29
- Valve Seat Material
- Stainless steel BS 970 431 S29
- Certification
- PED 97/23/EC, CE marking, EN 10204 3.1 certificate (optional)
Application scenarios
Process steam tracing loop condensate drainage
Drains condensate from steam tracing circuits, discharging it at a preset temperature below saturated steam temperature while venting air and other non-condensable gases. Suitable for tracing applications that need to utilize part of the condensate's sensible heat.
Selection points
Alloy steel body and cover for medium-pressure, high-temperature service
The body is made of DIN 17245 CS 22 Mo4 alloy steel and the cover is made of DIN 17243 13Cr Mo44 alloy steel. With a maximum operating pressure of 45 bar g and a maximum operating temperature of 450°C, it is suitable for medium-pressure, high-temperature steam systems.
Multiple sizes and piping connection options
Available in 1/2 in., 3/4 in., 1 in. and 1-1/2 in. sizes, corresponding to DN15 through DN40, with BSP or NPT threaded, butt-weld, BS 3799 Class 3000 socket-weld, and EN1092 PN64, ASME 300, and JIS/KS 30K flanged connections.
Stainless steel strainer and key internal components
The product features an ASTM A240 316L stainless steel strainer, corrosion-resistant bimetal and stainless steel thermostatic elements, and BS 970 431 S29 stainless steel valve plug and seat.
Maintainable design
SM45 is a maintainable steam trap suitable for applications requiring maintenance of internal valve components.
FAQ
How does the SM45 bimetallic steam trap work?
The SM45 uses a bimetallic element as its operating component. It can be preset to discharge condensate at a temperature below saturated steam temperature while also venting air and other non-condensable gases.
How should the SM45 be installed?
The SM45 should be installed horizontally, with the bimetallic element positioned horizontally and the cover at the top. When connecting the piping by arc welding, it is not necessary to remove the bimetallic element.
What connection types and sizes are available for the SM45?
BSP or NPT threaded, butt-weld, socket-weld, and flanged connections are available. Threaded, butt-weld, and socket-weld versions are available in 1/2 inch, 3/4 inch, 1 inch, and 1-1/2 inch sizes; flanged versions are available in DN15, DN20, DN25, and DN40. The specific configuration must be confirmed based on the actual model and application conditions.
What are the maximum operating pressure and temperature of the SM45?
The SM45 has a maximum operating pressure of 45 bar g, a maximum operating temperature of 450°C, and a minimum operating temperature of 0°C. The body design rating is PN63, with a maximum allowable pressure of 63 bar g@210°C. Actual service must also comply with the operating range limitations for the applicable connection type.
What spare parts are available for the SM45?
A bimetallic element assembly, strainer, and gasket set are available. When ordering spare parts, specify the steam trap model and size, and distinguish between the cover bolt, gasket, and nut configurations for previous and current models.