What is a stall condition and why do I need a pump-trap?

Stall occurs when the pressure in the steam space drops below the condensate return line pressure, preventing gravity drainage. A pump-trap uses motive steam pressure to mechanically push condensate out, ensuring reliable drainage even under stall conditions.

Are the air vent, check valve, and air eliminator included with the unit?

No. Items such as air vent (PC10HP/UBP32), check valve, ball valve (DN15), and air eliminator (AE50S) must be ordered separately. These are intended to be connected by the end user at the system outlet as per the Installation and Maintenance Instructions (IM-P680-02).

Can I use the APT14-PPU with superheated steam?

Yes. The APT14-PPU and APT14HC-PPU accept saturated or superheated steam up to the stated maximum motive pressure of 13.8 bar g and temperature of 198°C. For conditions beyond these limits, contact Spirax Sarco or PC Engineering for guidance.

What certifications are available for these pump-trap units?

Standard supply includes a Declaration of Conformity per PED 2014/68/EU. Additional certification for individual components (e.g., material test reports, third-party inspection) is available at extra cost—requirements must be specified at order placement.

How do I size the correct APT unit for my application?

Sizing depends on motive pressure, backpressure (including lift, return system pressure, and frictional losses), and condensate load. Contact PC Engineering with your process parameters for accurate sizing assistance.

SPIRAX SARCO · STEAM TRAPS

Spirax Sarco APT10, APT14 & APT14HC-PPU Automatic Pump-Trap Packaged Units

Name: Spirax Sarco APT10, APT14 & APT14HC-PPU Automatic Pump-Trap Packaged Units
Brand: Spirax Sarco

Spirax Sarco APT10/APT14/APT14HC-PPU automatic pump-trap units for stall condensate removal. Up to 9000 kg/h capacity. Buy from PC Engineering India.

Request a Quote More Steam & condensate

Overview

The Spirax Sarco APT10-PPU, APT14-PPU, and APT14HC-PPU are steam-operated automatic pump-trap packaged units engineered specifically for removing condensate from plant systems operating under stall conditions. These closed-system units combine pumping and trapping functions in a single, pre-assembled package, eliminating the need for complex field assembly.

Each unit is supplied complete with a condensate receiver, motive supply drain trap, and all necessary ancillaries. The system handles capacities up to 2,800 kg/h for pumping and 9,000 kg/h for trapping, depending on available differential pressure. Standard construction utilizes SG iron for the pump-trap body, with electroless nickel plated (ENP) versions available for corrosive applications.

All welding on the packaged units conforms to ASME IX, BS EN 287/288, and BS EN ISO 15614 standards. The products comply with European Pressure Equipment Directive 2014/68/EU and carry the CE mark, with additional certification available upon request.

Key Features

Plug-and-play system designed for rapid installation in stall condensate applications
Combined pumping (up to 2,800 kg/h) and trapping (up to 9,000 kg/h) capability
Steam-operated — no electrical supply required
Pre-assembled with receiver, drain trap, strainer, and diffuser
SG iron construction; ENP coating available on request
PED 2014/68/EU compliant with CE marking
Welding per ASME IX and BS EN ISO 15614 standards
Optional spool piece for flexible pipework connection

Specifications

Parameter	APT10-PPU	APT14-PPU	APT14HC-PPU
Unit Size	DN20 x DN20 (¾" x ¾")	DN40 x DN25 (1½" x 1")	DN50 x DN40 (2" x 1½")
Pressure Class	PN10	PN16	PN16
Max Motive Inlet Pressure	4.5 bar g	13.8 bar g	13.8 bar g
Max Operating Pressure	4.5 bar g	13.8 bar g	13.8 bar g
Max Backpressure	4 bar g	5 bar g	5 bar g
Max Operating Temperature	155°C	198°C	198°C
Min Operating Temperature	0°C	0°C	0°C
Cold Hydraulic Test Pressure	15 bar g	24 bar g	24 bar g
Condensate Inlet (W)	DN65	DN100	DN125
Motive Supply (X)	DN15	DN15	DN15
Exhaust/Balance Line (Y)	DN15	DN15	DN15
Condensate Outlet (Z)	DN20	DN25	DN40
Approx. Weight	110 kg	170 kg	220 kg
Component	Material
Receiver	Carbon steel
Ball valves (DN20–DN50)	Steel with PTFE seals
Trap set (DN15)	Stainless steel with PTFE seals
Strainer (DN15–DN50)	SG iron
Pump-trap	SG iron
Diffuser	Stainless steel
Base/supporting frame	Carbon steel

Applications

Spirax Sarco APT pump-trap packaged units are suited for any steam system where condensate must be removed under stall or low differential pressure conditions:

- Heat exchangers and plate heaters operating below steam supply pressure - Process heating coils with modulating temperature control - Air handling units (AHUs) in HVAC systems - Jacketed vessels and reactors in chemical and pharmaceutical plants - Paper dryers and textile finishing equipment - Food and beverage processing lines with temperature-controlled steam heating

These units are widely deployed in refineries, power plants, textile mills, pharmaceutical facilities, and food processing plants across India.

Frequently Asked Questions

Get a Quote

Contact PC Engineering for pricing, availability, and technical support for Spirax Sarco APT10, APT14 & APT14HC-PPU Automatic Pump-Trap Packaged Units. Call us or fill in our inquiry form — our engineers will respond within 24 hours.

Related Steam Traps

Brand

Find the losses before you invest in new equipment.

Steam and pump system walkthroughs that identify inefficiencies, energy losses and improvement priorities before any new product is specified.

Request an Energy Audit