Heavy cold- and freezer-room sliding doors

Isomasters’ heavy and well-insulated sliding doors are extremely strong and durable. Solid, because we strengthen each door with an additional aluminium frame during the manufacturing process. Durable, because isomasters doors last a lifetime, are low maintainance, and easy to clean. Airtight seals are guaranteed in any temperature-controlled area.

We offer the following models:
  • ZPE: heavy sliding doors for positive temperatures
  • ZNE: heavy sliding doors for negative temperatures

Technical Details

Door leaf

The door leaf consists of two galvanised and pre-lacquered steel sheets, between which polyurethane (PUR) is injected. The door leaf is 100 mm thick. At the bottom of the door we provide an adjustable rubber, a single one for a cold room door and a double for freezer doors. The rubber seal we attach to three sides of the sliding door is always a double, whether you order a coldroom or a freezer door. Finally, we add an aluminium frame around the door leaf of this type of sliding door. 

A ZPE or ZNE door with an ALU125 rail or a stainless steel tube rail:

  • Width: 800, 900, 1100, 1200, 1400, 1500, 1700 or 2000 mm
  • Height: 2100, 2200, 2400, 2700 or 3000 mm
A ZPE or ZNE door with an ALU250 rail or a stainless steel tube rail:
  • Width: 2000, 2300 or 2600 mm
  • Height: 2200, 2400, 2700, 3000, 3300 or 3600 mm


Door leaf
Door frame

A standard door leaf of a sliding coldroom door consists of two white (RAL9010), pre-lacquered steel sheets, finished with a Cleansafe 25µm coating. Between the two sheets we inject polyurethane (PUR) during the production process. 
If you prefer other colours, you can select the colour of your choice as an option and add it to your order. 
Furthermore, we offer the PET55 (Cleansafe 55µm) coating as an option as well. We recommend this coating when the doors will be installed in aggressive environments (such as salty environments) or when they will be cleaned very intensively. 
Moreover, various stainless steel finishes are available. We offer five different options (RVS Cleansafe): 
  • Stainless steel 304 sun brushed
  • Stainless steel 304 line brushed
  • Stainless steel 304 smooth unpolished
  • Stainless steel 304 linen design
  • Stainless steel 316 sun brushed

We offer PVC and aluminium frames for the heavy sliding coldroom and freezer doors. 

PVC frame (P-frame)
  • 120 x 30 mm
  • white (RAL 9010)
  • PVC counter-frame with an L-profile
  • Option: frame cladding in stainless steel or coloured steel sheet
Aluminum frame (N-frame)
  • 240 x 25 mm
  • white (RAL 9010)
  • including thermal bridge interruption
  • 120 x 15 mm aluminium counter-frame

Door handle on the inside and outside: fixed handle in stainless steel or aluminium: type 7530

  • Aluminium rail: ALU125 or ALU250. The type of rail we add to the sliding door by default depends on the size and weight of the sliding door. 
  • Anodised aluminium rail
  • Equipped with plastic rollers
  • Including cover and end stops
  • Tube rail in stainless steel

  • Lock and emergency opener: Pinlock 7150
  • Swanneck in stainless steel AISI 304
  • Protective bumper attached to the door leaf in RAL7016 (anthracite) or RAL2004 (orange)
  • Protective plate glued on the bottom half of the door leaf in RVS or PVC
  • Bumper posts and bars in RVS

One of the options you can select when ordering a light sliding coldroom or freezer door is the basic automation package. In this basic package you will find the following elements:
  • electromechanical fully automatic motor
  • prewired command board IP56
  • edgemount security on the closing side is included with every ALU250 rail but optional in case of an ALU125 rail
  • 1 push button (start/stop) exterior
  • 1 push button (start/stop) interior
  • railtrack covering
  • timer
  • without cables and cable channels
  • without mounting accessories
You can also order the following mounting accessories from isomasters as an addition to the basic automation package:
  • screws and mounting brackets
  • electrical cables (LIYY 3G0.75: 20 lm)
  • PVC tubes with a diameter of 20 mm: 12 lm
  • PVC cable channels 32 x 20 mm: 2 lm
  • 2 pull commands: 2 x 5 lm
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