Description
Spirax Sarco APT10-4.5 automatic pump-trap features PN10 design pressure and threaded connections. Depending on pipeline conditions, it can automatically drain or pump condensate. Steam-powered operation removes condensate from heating equipment and process applications under all operating conditions, including vacuum conditions. Standard APT10-4.5 has a blue finish; ENP nickel plating is also available on request.
Available Model
| Model | SKU |
|---|---|
| apt10-4.5 3/4” condensate conn, 1/2” motive steam conn | 6120100 |
Design Standards
Body design complies with A.D. Merkblatter/ASME VIII standards.
Materials
| No. | Component | Material |
|---|---|---|
| 1 | Pump cover | Ductile iron EN JS 1025 ASTM A395 |
| 2 | Pump cover gasket | Synthetic fiber |
| 3 | Pump body | Ductile iron EN JS 1025 ASTM A395 |
| 4 | Pump cover bolts | Stainless steel BS EN ISO 3506 Gr.A2-70 |
| 5 | Pump valve linkage | Stainless steel BS 1449 304 S15 |
| 6 | Float | Stainless steel BS 1449 304 S16 |
| 7 | Pivot pin | Stainless steel BS 970 431 S29 ASTM A276 431 |
| 8 | Washer | Stainless steel BS 1449 316 |
| 9 | Pump-trap cover | Stainless steel BS 970 431 S29 ASTM A276 431 |
| 10 | Ball | Stainless steel ASTM A276 440 B |
| 11 | Seat (inlet check valve) | Stainless steel AISI 420 |
| 12 | Disc (inlet check valve) | Stainless steel BS 3146 ANC 4B |
| 13 | Pump mechanism bracket | Stainless steel BS 3146 ANC 4B |
| 14 | Spring (pump) | Stainless steel BS 2056 302 S26 Gr.2 |
| 15 | Split pin | Stainless steel BS 1574 |
| 16 | Exhaust valve seat | Stainless steel BS 970 431 S29/ ASTM A276 431 |
| 17 | Inlet valve and seat assembly | Stainless steel ASTM A276 440B/ BS 970 431 S29 |
| 18 | Exhaust valve | Stainless steel BS 3146 ANC 2 |
| 19 | Valve seat gasket | Stainless steel BS 1449 409 S19 |
| 20 | Pump mechanism bolts | Stainless steel BS EN ISO 3506 Gr.A2-70 |
| 21 | Float bolt | Stainless steel BS EN ISO 3506 Gr.A2-70 |
| 23 | Pump-trap gasket | Stainless steel BS 1449 409 S19 |
| 24 | Pushrod | Stainless steel BS 3146 ANC 2 |
| 25 | Nameplate | Stainless steel BS 1449 304 S16 |
| 26 | Blowdown plug | Stainless steel DIN 17440 1.4571 |
| 27 | Motive steam strainer | Ductile iron DIN 17440 1.4571 |
Certificates and Standards
EN10204 3.1.B certification is available for this product. Note: specify certification requirements when placing the order. This product complies with European Pressure Equipment Directive 97/23/EC and ATEX Directive 94/9/EC. Compliance documentation and marking can be provided as required.
Size and Pipe Connections
| Size | Inlet | Outlet | Motive Inlet / Exhaust Outlet |
|---|---|---|---|
| Nominal size | DN20(¾”) | DN20(¾”) | DN15(½”) |
| Connection type | BSP-BS21、NPT | BSP-BS21、NPT | BSP、NPT |
Rated capacity: contact Spirax Sarco for detailed capacity information. The following data is required for pump-trap selection:
-
Available installation height (m): from the pump-trap base to the centerline of the heat exchanger/process condensate outlet. If the outlet runs vertically downward, measure from the pump-trap base to the outlet face.
-
Motive steam pressure for the pump-trap (bar g).
-
Total back pressure in the condensate recovery system (bar g), as described in the note below.
-
Operating pressure of the heat exchanger at full load (bar g).
-
Maximum steam load of the heat exchanger (kg/h).
-
Minimum temperature of the heated medium ( oC).
-
Maximum controlled temperature of the heated medium ( oC).
Operating Limits
| Pump body design condition | PN10 |
|---|---|
| Maximum motive pressure | 4.5 bar g |
| Maximum operating pressure | 4.5 bar g |
| Maximum back pressure | 4.0 bar g |
| Maximum operating temperature | 155 o C |
| Minimum operating temperature | -10 o C |
| Temperature limit (ambient) | -10 o C - 200 o C |
| Maximum cold hydraulic test pressure | 15.0 bar g |
| Minimum installation height (from pump base) | 0.2 m |
| Recommended minimum installation height (from pump base) | 0.3 m |
| Size | DN20 × DN20 |
|---|---|
| Pump displacement / cycle | 2.6 liters |
| Conditions | At 1.0 m installation height, 4.5bar g motive pressure, and 2.5bar g total back pressure: maximum condensate drainage capacity 830kg/h and maximum pumping capacity 650kg/h |
Safety Information, Installation and Maintenance
Note: Total lift or back pressure BP (static head + return-line pressure) must be lower than motive pressure to achieve rated capacity.
[BP( back pressure )=(H × 0.0981)+§+(P f)]
Height (H) in meters × 0.0981 + return-line pressure §bar g + downstream piping friction pressure drop (Pf)bar. (Downstream piping friction resistance may be disregarded if downstream piping is less than 100 meters, the condensate piping is not a flooded line, and the effect of flash steam at full heat exchanger load has been considered during pipe sizing.)
Refer to the installation and maintenance guide supplied with the product for detailed instructions.
Weight
| Size | Weight |
|---|---|
| DN20 × DN20 | 14kg |
Product Description
Spirax Sarco automatic pump-trap APT10-4.5 supports maximum steam operating pressure up to 4.5 bar g and requires no electricity. The pump body is made of ductile iron (GGG 40.3 or ASTM A395) and includes a swing-type inlet check valve and ball-type outlet check valve. The internal pump-trap mechanism consists of a stainless steel float connected to an integral pump-trap. Pump, pump-trap, and check valve mechanisms are integrated into one body without external seals or packing. Minimum installation height is 200mm from the pump base.
Ordering Information
Example: 1 automatic pump-trap, model APT10-4.5, DN20×DN20, BSP threaded connections, with threaded BSP motive steam connection.
Spare Parts
Spare parts are shown with solid lines; parts shown with broken lines are not supplied as spare parts. Available spare parts:
| Item | Spare part description | Component item numbers |
|---|---|---|
| A | Pump cover gasket | 2 |
| B | Inlet check valve | 2, 12 |
| C | Spring and pushrod | 2, 14, 24 |
| D | Float | 2, 5, 6, 21 |
| E | Pump-trap and outlet check valve mechanism | 2, 7, 8, 9, 10, 22, 23 |
| F | Inlet / exhaust valve plug and seat assembly | 2, 16, 17, 18,19 |
| G | Motive steam strainer (Fig12 ductile iron) | - |
For convenient maintenance, spare parts are supplied as complete sets to ensure that all required components are available. For example, when ordering the inlet/exhaust valve plug and seat assembly, all split pins, washers, and gaskets requiring replacement are supplied with the main components.
To order spare parts, use the descriptions in the available spare parts table and specify product size and model. Example: 1 inlet/exhaust valve plug and seat assembly for Spirax Sarco DN20×DN20 APT10-4.5 automatic pump-trap.
