Spirax Sarco APT14 Installation And Maintenance Instructions Manual
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Spirax Sarco APT14 Installation And Maintenance Instructions Manual

Automatic pump traps
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6120250/12
APT14, APT14HC and APT14SHC
Installation and Maintenance Instructions
IM-P612-04 ST Issue 12
Automatic Pump Traps
1. Safety information
2. Product information
3. Operation
4. Installation
•
Closed loop steam systems only
5. Commissioning
6. Maintenance
7. Replacement of spares (1):
•
Cover gasket
•
Inlet swing check valve
•
Spring and actuator arm
•
Floats
8. Replacement of spares (2):
•
Trap and outlet check valve
mechanism
•
Steam inlet / exhaust valves and
seats
9. Fault finding guide
IM-P612-04
ST Issue 12
© Copyright 2017
1
Printed in GB

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Summary of Contents for Spirax Sarco APT14

  • Page 1 IM-P612-04 6120250/12 ST Issue 12 APT14, APT14HC and APT14SHC Automatic Pump Traps Installation and Maintenance Instructions 1. Safety information 2. Product information 3. Operation 4. Installation • Closed loop steam systems only 5. Commissioning 6. Maintenance 7. Replacement of spares (1): •...

  • Page 2: Safety Information

    Determine the correct installation situation and direction of fluid flow. iv) Spirax Sarco products are not intended to withstand external stresses that may be induced by any system to which they are fitted. It is the responsibility of the installer to consider these stresses and take adequate precautions to minimise them.

  • Page 3: Protective Clothing

    Allow time for temperature to normalise after isolation to avoid danger of burns. 1.9 ools and consumables Before starting work ensure that you have suitable tools and/or consumables available. Use only genuine Spirax Sarco replacement parts. 1.10 Protective clothing Consider whether you and/or others in the vicinity require any protective clothing to protect against the hazards of, for example, chemicals, high/low temperature, radiation, noise, falling objects, and dangers to eyes and face.
  • Page 4 Section 2. Product specific - safe lifting information Please note that the Spirax Sarco APT14 automatic pump trap units come complete with holes which may be tapped or untapped. These holes may be used for lifting purposes at the sole risk and responsibilty of the purchaser.

  • Page 5: Residual Hazards

    1.16 Returning products Customers and stockists are reminded that under EC Health, Safety and Environment Law, when returning products to Spirax Sarco they must provide information on any hazards and the precautions to be taken due to contamination residues or mechanical damage which may present a health, safety or environmental risk.

  • Page 6: Product Information

    2. Product information 2.1 General description The Spirax Sarco automatic pump trap is a flanged or screwed displacement receiver pressure rated to PN16. The unit is capable of automatically trapping or pumping, depending on pipeline conditions. The unit is operated by steam and is used to remove condensate from process plant under all operating conditions including vacuum.
  • Page 7 Optional extra Both the APT14 and APT14HC are available with the body and cover coated with electroless nickel plate (ENP). This option, when required, will be denoted as APT14 ENP and APT14HC ENP respectively and must be stated at the time of order placement.
  • Page 8 2.3 Pressure / temperature limits - APT14 and APT14HC (SG iron) - see Section 2.4 for the APT14SHC Pressure psi g Steam saturation curve 13.8 Pressure bar g The product must not be used in this region. The product should not be used in this region or beyond its operating range as damage to the internals may occur.
  • Page 9 300 °C @ 12.8 bar g (572 °F @ 186 psi g) Minimum allowable temperature -10 °C (14 °F) Note: For lower temperatures consult Spirax Sarco. Maximum operating pressure for 13.8 bar g @ 198 °C (200 psi g @ 388 °F) saturated steam service...
  • Page 10 2.4 Pressure / temperature limits - APT14SHC (Carbon steel) - see Section 2.3 for the APT14 and APT14HC Pressure psi g 80 100 120 140 160 180 200 220 40 60 Steam saturation curve 13.8 Pressure bar g Pressure psi g...
  • Page 11 300 °C @ 12.8 bar g (572 °F @ 186 psi g) Minimum allowable temperature -10 °C (14 °F) Note: For lower temperatures consult Spirax Sarco. Maximum operating pressure for 13.8 bar g @ 198 °C (200 psi g @ 388 °F) saturated steam service...
  • Page 12 2.4 Nominal capacities For full capacity details for a specific application consult Spirax Sarco. To accurately size the pump trap, the following data is required. 1 .Installation head available, from the base of the pump trap to the centre line of the heat exchanger / process condensate outlet (metres, feet or inches).

  • Page 13: Dimensions / Weights

    (approximate) in mm and kg Weight Model PN16 ANSI Screwed 350 198 246 385 304 258 APT14 Flanged 389 198 246 385 304 258 Flanged 476 198 270 400 335 261 31.5 APT14HC APT14SHC Flanged 508 206 278 407 351 261 31.5...
  • Page 14 Stainless steel ASTM A276 440 B Trap housing Stainless steel BS 3146 ANC 2 10 Ball (APT14 only) Stainless steel ASTM A276 440 B 11 Seat (inlet check valve) Stainless steel AISI 420 12 Flap (inlet check valve)
  • Page 15 Fig. 3 Trap mechanism APT14 APT14HC and APT14SHC IM-P612-04 ST Issue 12...
  • Page 16 BS 3146 ANC 2 25 Name-plate Stainless steel BS 1449 304 S16 26 Drain plug Steel DIN 17440 1.4571 27 Inlet valve spring Stainless steel APT14 SG iron 28 Motive strainer APT14HC SG iron APT14SHC Carbon steel DCV10 Stainless steel...
  • Page 17 Fig. 4 Trap mechanism APT14 APT14HC and APT14SHC IM-P612-04 ST Issue 12...

  • Page 18: Operation

    Motive steam inlet Step 3 (Figure 7) However, with the APT14, APT14HC and APT14SHC, the condensate simply fills the main chamber - lifting the float until the changeover linkage is engaged, opening the motive inlet and closing the exhaust valve.
  • Page 19 PB valve to open. Fig. 9 APT14 shown Step 6 (Figure 10) As the pressure inside the APT14 Exhaust equalises with the condensate inlet pressure through the open exhaust valve, condensate re-enters via Condensate inlet PS the inlet swing check valve.

  • Page 20: Installation

    4. Installation Important - safety note Please read Section 1.12 regarding the safe lifting of this product before actioning any installation or maintenance procedure. Before any installation or maintenance procedure, always ensure that all steam or condensate lines are isolated. Ensure any residual internal pressure in the product or connecting lines is carefully relieved.
  • Page 21 1 m. It is recommended that the reservoir be installed at least 1 pipe diameter below the process outlet, but as high as possible above the APT14, APT14HC or APT14SHC inlet (up to 1 metre (40")). Fig. 11 IM-P612-04 ST Issue 12...

  • Page 22: Inlet Piping

    Generally a length and diameter of pipe to accommodate the following condensate capacity will be sufficient: 4 litres (1.1 gallons) for an APT14 or 8 litres (1.76 gallons) for an APT14HC and APT14SHC. It is recommended this condensate reservoir is situated at least 1 pipe diameter below the process outlet but as high as possible above the APT inlet (up to 1 metre (40")).
  • Page 23 It is important for the outlet piping to be correctly sized to prevent excessive backpressure on the APT14, APT14HC or APT14SHC. This pipework should be sized to take into account the effects of flash steam at the heat exchangers full load operating conditions and any other equipment being discharged into the return line.

  • Page 24: Pressure Gauges

    Recommend minimum 0.3 m, maximum 1 m. It is recommended that the reservoir be installed at least 1 pipe diameter below the process outlet, but as high as possible above the APT14, APT14HC or APT14SHC inlet. IM-P612-04 ST Issue 12...
  • Page 25 4.6.1 Fail safe condition of motive supply. When the APT14 is used to remove condensate from temperature controlled plant such as heat exchangers, it is recommended that the motive supply to the APT is taken from a point downstream of a fail safe high limit control valve, see Figure 15.
  • Page 26 After ensuring the inlet and outlet pipe connections and motive/exhaust connections are coupled in accordance with Figures 15 and 16, slowly open the motive steam inlet line to supply pressure to the APT14, APT14HC or APT14SHC. Ensure the exhaust/ balance line is open and not restricted in any way.
  • Page 27 Condensate outlet Return line Trapped motive steam supply Exhaust Motive Condensate inlet Fig. 17 APT14HC shown IM-P612-04 ST Issue 12...

  • Page 28: Maintenance

    (a minimum withdrawal distance of 250 mm for the APT14 or 275 mm for the APT14HC and APT14SHC will be needed). Lift the cover assembly to a bench or other convenient working surface and clamp securely, avoiding contact with the gasket face.

This manual is also suitable for:

Apt14hcApt14shc

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