Technical drawing
Pressure relief valve · AiFO
Pressure relief valve (up to 20 m3, -30/0°C) ZD-847
Item no. ZD-847 · EAN 2010000040935
- simple design and easy installation
- excellent operation wherever pressure equalisation is needed in rooms of different temperature
- they act progressively by means of rotating diaphragms set in motion by overpressure or underpressure
- made entirely of nylon
- freezer versions resistant to low temperatures
- temperature
- below zero
- energy consumption
- 7 W
- telescopic
- yes (70/130 mm)
In brief
- The ZD-847: freezer version for chambers with a volume up to 20 m3.
- Draws 7 W, nylon body, 70/130 mm telescope.
- The positive equivalent is carried under the code ZD-849.
Prices and stock levels are in the B2B shop. Sets of cold room fittings are put together to order.
Pressure relief valve (up to 20 m3, -30/0°C) ZD-847 – how to choose the right one
The ZD-847 is a pressure relief valve in the freezer version, designed for chambers with a volume up to 20 m3, drawing 7 W, with a nylon body. Telescopic adjustment covers the 70/130 mm range.
This is the only item for sub-zero temperatures in this range with such a low power draw - the other freezer versions start from eight and sixteen watts. The unit's scale and the chamber's small volume explain the difference.
The ZD-847 and ZD-849 pair shows well how this catalogue splits temperature versions. Same body, same telescope, and the only thing that decides is the operating regime of the chamber the valve goes into.
How to match the fittings to the panel thickness and the weight of the door – we explained it in the selection guide for this category.
Where it works
- Small back-of-house freezers and blast chambers
- Fit-outs with a wall thicker than standard
- Replacing a valve in a chamber of a dozen or so cubic metres
- Installations where low power draw matters
FAQ
Frequently asked questions
Have not found your answer? Give the panel thickness and the door dimensions – we will select a complete set of fittings.
Ask a questionCan the positive version be used in a freezer?
No, the manufacturer splits the two versions precisely because of temperature. A part designed for the positive range would ice up in a freezer.
How do I check whether the telescope will cover my wall?
Measure the full thickness of the partition together with the finish on both sides. The result needs to fall within the 70 to 130 mm range.
Enquiry
We will quote Pressure relief valve (up to 20 m3, -30/0°C) ZD-847 for your appliance
Give the panel thickness, the door dimensions and the type of cold room – we will reply with a selection and a quote.
B2B shopGet in touch
We usually reply within 24 working hours.