Next Stop Canada - News

Next Stop Canada

24 May 2017

Seward Refrigeration have designed a new pumped ammonia plant feeding a spiral freezer currently being installed for a food processing site In Canada. The project is being project managed by Seward Refrigeration over the coming months including commissioning on completion.

The spiral freezer is designed to freeze five metric tonnes of product per hour, with the product entering the spiral freezer at +90°C and is frozen down to -18°C. The spiral freezer is designed to operate continuously for a 21 day period and to achieve this there are five sequential defrosting ammonia evaporators each with a duty of 418 kW, operating with pumped ammonia at -32°C. Four of the coils are continually in use with the fifth coil defrosting with hot gas.

A split surge drum will provide -32/-5°C ammonia. Connected to the -32°C dry suction line, are two open flash economised screw compressors each operating at 3600 RPM and directly driven by 530 kW, 4100 volt high-efficiency inverter operated motors. The -5°C surge drum section offers liquid sub cooling and connection onto the new retrograde product drier and 0°C transfer tunnel. The compressor on this section is A screw compressor operating at 3600 RPM and directly driven by a 350 kW, 4100 volt high-efficiency inverter operated motor.

A high-efficiency condenser suitable for operation in the extreme winter conditions of Canada will be installed with a remote sump and condenser pump fitted within the compressor plantroom.


Recent News

Seward Refrigeration Installing new refrigeration plant for Dragon’s Den contestant
21 Apr 2020

We are currently installing a number of commercial refrigeration systems for Kirstys new production facility in Yorkshire, which will soon be manufacturing a healthy range of ready meals.

COVID-19 Update
26 Mar 2020

To protect our staff during the current Coronavirus pandemic, we've taken the decision to close our office until further notice. During this time our office staff will be working remotely from home.

Ammonia plant upgrade - India
6 Dec 2019

Our contracts director is currently in India commissioning additional plant that has recently been installed for a Blue chip food manufacturing company.

£50m Telford expansion gives Muller 500m pot capacity, creates 65 jobs
14 Nov 2019

It was great to be part of this prestigious installation project. Seward Refrigeration were awarded the installation contract to upgrade the existing ammonia / glycol plant feeding a new blast chilling tunnel and evaporators in chilled areas.

seward news south america
South American Project
8 Nov 2019

In 2016, Seward Refrigeration designed & commissioned a two stage pumped ammonia system in South America. We provide maintenance checks on the plant.


Seward are committed to offering the best solutions, the greatest efficiency, the strongest reliability, and the best service to all our clients. CALL US NOW ON 0161 724 0357

Linkedin