Spirax Sarco No.8 thermostatic fixed-temperature steam trap, featuring a thermostatic element adjustable from 60°C to 100°C for condensate discharge at the set temperature. The body is bronze, while the valve head and seat are stainless steel. Designed to PN25, it is available with 1/2 in. BSP or NPT threaded connections. Suitable for installation at the condensate outlet at the lower end of steam-heating coils or equipment, with the outlet facing upward.
No.8 Fixed-Temperature Discharge Steam Trap - Product View
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Spirax Sarco No.8 Thermostatic Fixed-Temperature Discharge Steam Trap
Thermostatic fixed-temperature discharge steam trap with adjustable discharge temperatures from 60°C to 100°C.
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Specifications
- Discharge Temperature Range
- Adjustable from 60°C to 100°C
- Valve Body Design Pressure Rating
- PN25
- Maximum Allowable Pressure
- 25 bar g
- Maximum Allowable Temperature
- 250°C
- Maximum Operating Pressure
- 17 bar g, saturated steam service
- Maximum Operating Temperature
- 232°C
- Design Maximum Cold Hydraulic Test Pressure
- 38 bar g
- Connection Type
- 1/2-inch BSP or NPT threaded connection
- Installation Orientation
- Install below the equipment, with the outlet facing upward
- Valve Body Material
- Gunmetal, BS EN CC 491K
- Valve Plug Material
- Stainless steel, AISI 440B
- Valve Seat Material
- Stainless steel, BS 970 431 S29
Application scenarios
Fixed-temperature condensate discharge from below steam heating coils or equipment
Can be installed at the condensate outlet below steam heating coils or equipment, with the outlet facing upward. The oil-filled thermostatic element discharges condensate at the set temperature, adjustable from 60°C to 100°C.
Selection points
Adjustable temperature discharge
The condensate discharge temperature can be adjusted from 60°C to 100°C.
Stainless steel valve and seat
The valve is made of AISI 440B stainless steel, and the seat is made of BS 970 431 S29 stainless steel.
1/2-inch BSP or NPT threaded connections
The product is available with 1/2-inch BSP or NPT threaded connections.
Installation & maintenance notes
Install at the lower end of the equipment with the outlet facing upward
The steam trap should be installed at the lower end of the equipment with the outlet facing upward.
Do not exceed the maximum operating pressure and temperature
Under saturated steam conditions, the maximum operating pressure must not exceed 17 bar g, and the maximum operating temperature must not exceed 232°C.
FAQ
How does the No.8 Thermostatic Fixed-Temperature Discharge Steam Trap work?
The trap uses an oil-filled thermostatic element to discharge condensate at the set temperature. The temperature setting range is 60°C to 100°C, enabling fixed-temperature discharge.
How is the temperature set on the No.8 steam trap?
The temperature is set by adjusting the adjustment device at the end of the thermostatic element. The specific temperature should be determined based on actual operating conditions and site test results.
What are the nominal size and pipe connection options for this product?
The standard model uses a 1/2-inch BSP or NPT threaded connection.
What are the main materials and structural components of this trap?
The main components include the adjustment nut, spring, valve body, and valve plug. Materials include brass, stainless steel, and gunmetal. Refer to the specification table for the material of each component.
What operating conditions and limitations should be considered during product selection?
Consider the valve body design rating of PN25, maximum allowable pressure, maximum allowable temperature, maximum operating pressure, and maximum operating temperature, as well as the design maximum cold hydraulic test pressure of 38 bar g. The specific configuration must be confirmed according to the actual model and application conditions.