Spirax Sarco FT44, FT44V, and FT44-C are carbon steel flanged ball float steam traps with a 1.0619+N/WCB cast steel body and stainless steel internals. The maximum allowable pressure is 40 bar g, and the maximum operating pressure for saturated steam is 32 bar g. Featuring an integral automatic air vent, they are suitable for condensate drainage from steam systems operating within the specified superheat range.
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Spirax Sarco FT44 Carbon Steel Flanged Ball Float Steam Trap
Carbon steel flanged ball float steam trap for continuous condensate discharge from steam systems, with an integral automatic air vent.
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Models
The FT44 series consists of carbon steel flanged ball float steam traps, with the main differences being installation orientation and additional functions. FT44 is the standard horizontal connection model, with the specified flow direction depending on nominal size. FT44V is a vertical connection model with top-to-bottom medium flow, suitable for vertical piping. FT44-C is a horizontal connection model based on FT44, with an added manually adjustable needle valve and steam lock release function. When selecting a model, first choose FT44 or FT44V according to the on-site installation orientation and flow direction, then select FT44-C based on whether steam locking is present and manual adjustment is required. Also verify the actual nominal size, maximum differential pressure, and pressure-temperature conditions.
FT44Standard horizontal connection carbon steel flanged ball float steam trap
FT44 is the standard model in this series, using horizontal flanged connections. Flow direction is left to right for DN15 to DN25, and right to left for DN40 and DN50. The product features a carbon steel body and stainless steel internals, fitted with a BP99/32 thermostatic air vent capsule and a built-in automatic air vent, and is suitable for condensate discharge in horizontal steam lines. Compared with FT44V, FT44 is intended for horizontal installation. Compared with FT44-C, the standard model does not include a manually adjustable needle valve or steam lock release function.
FT44VVertical connection carbon steel flanged ball float steam trap
FT44V is the vertical connection model in this series, using vertical flanged connections with top-to-bottom medium flow. This model features a carbon steel body and stainless steel internals, fitted with a BP99/32 thermostatic air vent capsule and a built-in automatic air vent. Its main differences from FT44 are the installation orientation and flow direction. Compared with FT44-C, FT44V is not a horizontal connection model with a manually adjustable needle valve and steam lock release function. When selecting this model, confirm that the site allows vertical installation and that the medium flows from top to bottom.
FT44-CHorizontal connection carbon steel flanged ball float steam trap with steam lock release function
FT44-C is a horizontal connection model based on FT44, with the same flow direction as FT44: left to right for DN15 to DN25, and right to left for DN40 and DN50. This model features a carbon steel body and stainless steel internals, fitted with a BP99/32 thermostatic air vent capsule, and adds a manually adjustable needle valve and steam lock release function. Compared with FT44, the main difference is the addition of the manually adjustable needle valve and steam lock release function. This model is for horizontal connections only.
Specifications
- Maximum Allowable Pressure
- 40 bar g @ 100°C
- Maximum Allowable Temperature
- 300°C
- Maximum Operating Pressure for Saturated Steam
- 32 bar g @ 239°C
- Maximum Operating Temperature
- 300°C @ 27.5 bar g
- Maximum Differential Pressure
- 4.5 bar, 10 bar, 21 bar, 32 bar
- Maximum Design Cold Hydraulic Test Pressure
- 60 bar g
- Minimum Allowable Temperature
- -10°C
- Body Material
- Cast steel 1.0619+N/WCB
- Main Valve Assembly Material
- Stainless steel BS 3146 Pt.2 ANC 2
- Float Linkage Mechanism Material
- Stainless steel BS 1449 304 S16
- Connection Size
- DN80, DN100
- Flange Standard
- EN1092 PN40, ANSI 150/300, JIS/KS 20K
- Installation
- Horizontal installation
- Built-in Air Vent
- Yes
- Compliant with Pressure Equipment Directive
- EN 97/23/EC
- Body Material
- Carbon steel 1.0619+N/WCB
- Internal Parts Material
- Stainless steel
- Connection Type
- Flanged connection
- Connection Size
- DN15, DN20, DN25, DN40, DN50
- Maximum Allowable Pressure (PMA)
- 40 bar g @ 100°C
- Maximum Allowable Temperature (TMA)
- 300°C @ 27.5 bar g
- Maximum Operating Pressure for Saturated Steam (PMO)
- 32 bar g @ 239°C
- Maximum Operating Temperature (TMO)
- 285°C @ 28.5 bar g
- Minimum Operating Temperature
- 0°C
- Maximum Differential Pressure (ΔPMX)
- 4.5 bar / 10 bar / 14 bar / 21 bar / 32 bar
- Design Cold Hydraulic Test Pressure
- 60 bar g
- Thermostatic Capsule Type
- BP99/32
- Superheated Steam Capability
- 150°C superheat @ 0 bar g, 50°C superheat @ 32 bar g
- Air Vent
- Built-in automatic air vent device
- Certification
- EN10204 3.1, PED 97/23/EC
Application scenarios
Condensate removal from steam systems within specified superheat limits
The FT44 can be used for condensate removal from superheated steam systems within its specified superheat, pressure and temperature ranges. The product documentation confirms its capability for superheated steam duty and specifies the allowable superheat at different pressures.
Selection points
Multiple maximum differential pressure options
FT44 is available in 4.5 bar, 10 bar, 14 bar, 21 bar, or 32 bar maximum differential pressure ratings to suit the actual application requirements.
Built-in automatic air vent
FT44 incorporates an automatic air vent valve for discharging air and non-condensable gases from the system.
BP99/32 capsule for limited superheated steam applications
FT44 uses a BP99/32 thermostatic capsule and can be used in superheated steam applications: 150 °C superheat at 0 bar g and 50 °C superheat at 32 bar g.
Horizontal and vertical connection models available
The standard FT44 is a horizontal connection model, while FT44V is a vertical connection model with top-to-bottom flow. Select the appropriate model according to the on-site piping direction.
Horizontal model available with manual needle valve and steam lock release function
FT44-C is available only for the horizontally connected FT44 and is fitted with a manually adjustable needle valve and steam lock release function (SLR).
Installation & maintenance notes
Install according to model and specified flow direction
The standard FT44 shall be installed with horizontal connections. Flow direction is left to right for DN15 to DN25, and right to left for DN40 and DN50. FT44V is a vertical connection model with top-to-bottom flow.
Verify allowable pressure, temperature, and maximum differential pressure
Before installation, confirm that the site pressure and temperature are within the product's allowable limits, and verify that the selected maximum differential pressure version covers the actual differential pressure. FT44 maximum differential pressure versions include 4.5 bar, 10 bar, 14 bar, 21 bar, and 32 bar.
FAQ
How does the FT44 float operated steam trap work?
The FT44 uses a float and main valve assembly to separate and discharge condensate from steam. The float rises and falls with the changing water level and, together with the air vent, provides initial air purging, achieving automatic condensate discharge.
What connection types and installation conditions apply to the FT44?
The body uses flanged connections of DN80 or DN100, supporting standards such as EN1092 PN40, EN1759-1, ANSI Class 150/300 and JIS/KS 20K. Horizontal installation is the primary configuration; where necessary, a discharge valve can be fitted by drilling a hole in the cover.
What certifications and certificates does this model have?
The product complies with the European Pressure Equipment Directive 97/23/EC. If a certificate is required, an EN 10204 3.1 certificate can be specified when ordering. The € marking can be provided on request.
What is the design parameter range of the FT44's operating conditions?
The design conditions are PN40, a maximum allowable pressure of 40 bar g @ 100°C, a maximum temperature of 300°C, a maximum operating pressure for saturated steam of 32 bar g @ 239°C, and a minimum operating temperature of -10°C.
Which key components should be considered for spares and maintenance?
Available spares include the main valve assembly, float linkage mechanism, air vent assembly and gasket sets. Make sure all relevant gaskets are on hand for overhaul, order them by model and size, and follow the installation and maintenance instructions supplied with the product.
What is the operating principle of the FT44?
The FT44 uses a carbon steel body and a float-controlled steam trapping principle: the float automatically opens and closes the discharge as the condensate level changes. A built-in air vent ensures that air purging and condensate drainage are coordinated in the steam system.
What is the difference in installation orientation between the FT44 and FT44V?
The FT44 has horizontal connections with flow from left to right, while the FT44V has vertical connections with flow from top to bottom. Both use flanged connections and can be maintained in-line.
How should the flange and connection specifications for the FT44 be selected?
The standard flange is EN1092 PN40 with face-to-face dimensions to EN26554 (Series 1). JIS/KS, ANSI B16.5 and other flanges, as well as extended face-to-face dimensions, can be provided as required.
What are the operating pressure and temperature ranges of the FT44 series?
The body design conditions are PN40, a maximum allowable pressure of 40 bar g, a maximum allowable temperature of 300°C and a minimum operating temperature of 0°C. The PN40 DN40/50 sizes also comply with the corresponding PMO/operating envelope limits.
How should additional accessory functions be selected if required?
The FT44-C manual regulating needle valve and steam lock release (SLR) function are available as options; please specify them when ordering. Threaded holes can also be added at the top or bottom of the cover for fitting a balance line or drain valve; the exact configuration must be confirmed when ordering.