The Gestra AK45 is a condensate drain valve equipped with an integral strainer and stainless steel internal components. The valve features a steel body, supports flanged or threaded connections, has a maximum operating pressure of up to 32 barg, and includes a manual drain knob that can be opened while the system is pressurized. It is designed for steam and condensate systems and is suitable for condensate drainage and manual draining under pressure in DN15 to DN25 pipelines.
Gestra AK45 double-flanged condensate drain valve product image
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AK45 Steam Condensate Discharge Valve | Gestra
Steel-body condensate discharge valve with integral strainer, DN15 to DN25, for manual discharge under pressure.
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Specifications
- Applicable media
- Steam and condensate
- Maximum operating pressure and temperature
- 32 barg (250°C); 22 barg (385°C); 21 barg (400°C)
- Closing differential pressure
- 0.8 bar (12 psig)
- Connection type
- Flanged connection or threaded socket
- Flange standards
- DIN PN40; ANSI Class 150, Class 300; B.S. 10 Table E, F, H, J
- Thread standards
- BSP, NPT
- Connection sizes
- DN15, DN20, DN25 (1/2 in, 3/4 in, 1 in)
- Body material
- Steel C 22.8 (1.0460), equivalent to ASTM A105
- Internal component material
- Stainless steel
- Integral strainer
- Yes
- Manual drain function
- Manual drain knob, openable while the system is pressurized
Application scenarios
Condensate drainage in steam systems
The AK45 is suitable for condensate drainage in steam and condensate systems. It features an integral strainer and can be installed with flanged or threaded connections.
Manual draining under pressure
The AK45 is equipped with a manual drain knob for condensate drainage while the system remains pressurized.
Installation & maintenance notes
Regular inspection and cleaning of the integral strainer
During maintenance, regularly inspect and clean the integral strainer, paying particular attention to fouling and deposits to prevent restricted condensate drainage or abnormal valve operation.
FAQ
What is the main operating principle of the AK45 in steam systems?
During startup, the AK45 automatically discharges condensate from the steam system until the system pressure reaches the set closing pressure. During shutdown, or when the pressure falls below the closing pressure, the valve opens to release accumulated condensate, maintaining the drainage function of the system.
What connection options does the AK45 offer, and which interfaces should be considered when selecting a model?
The AK45 is available with DIN/ANSI flanges, threaded connections and NPT threads. When selecting a model, confirm the end connection type together with the nominal diameter (DN) and the pressure rating (PN/PSI).
How do the AK45's body material and design features affect its suitability for the operating environment?
The valve body is made of steel (1.0460), the internal parts are stainless steel, and an integral strainer is built in. This design provides effective drainage in high-temperature, high-pressure steam systems and withstands the associated operating conditions.
What are the key installation requirements for the AK45, and how can effective discharge be ensured?
Connect the discharge outlet to an open drain system and install the valve vertically downward wherever possible; for horizontal installation, a 90° downward elbow is required. For steam main drainage, use a raised condensate line and avoid back pressure.
What are the main specifications and model variants of the AK45, and how do the models differ?
The AK45 series comprises AK45-15, AK45-20 and AK45-25, with nominal sizes DN15, DN20 and DN25, rated PN 40, and weights of approximately 3.0, 4.0 and 5.0 kg respectively. Identify the models by their DN/PN ratings and weights, and specify the end connection type when placing an order.