Quick answer. Cold-storage insulation with sprayed PU foam needs closed-cell polyurethane and a high-pressure machine that holds a stable reaction even at sub-zero ambient temperatures on site. After Graco and PMC withdrew, Russia's professional 25–36 MPa segment is effectively empty, and domestic machines cap at 0.4–3 MPa. Here is how to match a machine to cold-storage work: output, heated hose, certification, and service.
Why closed-cell PU foam for cold rooms
Cold and freezer rooms run at −18 to −40 °C, and any thermal bridge turns into condensation, ice, and rising energy cost. Sprayed closed-cell polyurethane delivers what boards cannot:
- Seamless layer — no joints for heat loss or moisture to travel through.
- Vapour barrier in one pass — the closed cells act as a barrier against water vapour, critical below freezing.
- High R-value — roughly 6–7 per inch, so a thinner layer gives the same insulation.
- Conforms to complex geometry — pipes, corners, embeds and ceiling beams are covered in one continuous envelope.
What the machine must deliver
- 25–36 MPa pressure for full atomization and stable reaction over large areas.
- 2–12 kg/min output to close wall and ceiling area within a shift.
- High-power heating (26 kW class) and accurate 35–40 °C material temperature — decisive in cold ambient.
- Heated hose tested to −25 °C, holding material temperature within ±3 °C along its full length — the key part for winter and freezer work.
Which JYYJ model to choose
- JYYJ-H600 — entry hydraulic, 36 MPa, 2–12 kg/min. Ideal for a crew taking medium-size rooms.
- JYYJ-H-V6T — same hydraulic plus a 7-inch PLC with recipe memory for repeatable results.
- JYYJ-H-V8 — high output 2–15 kg/min for large cold-storage warehouses, at a lower price than the PLC flagship.
All three spray both PU foam and polyurea. See the full 17-model range in our machine lineup.
Certification, logistics and service
- CE is the baseline (2006/42/EC + 2014/30/EU) — it eases customs and large industrial contracts.
- Price is a fraction of a comparable Graco H-XP3 at the same working pressure.
- Spare parts — critical wear items air-shipped in 3–5 days vs weeks through Western dealers; keep a 6-month buffer.
- Russian-language support via Telegram, response within 24 hours.
FAQ
Is a 3 MPa domestic machine enough for a cold room?
For thin work sometimes, but large areas and consistent closed-cell density need high-pressure atomization. At 3 MPa the risk of under-cure and uneven density rises.
What PU density for cold storage?
Usually closed-cell 30–50 kg/m³; thickness is set by room temperature, calculated as density × area × thickness.
Planning cold-storage or cold-warehouse insulation and matching a machine to your volume and mains voltage? Contact us — we reply in Russian via Telegram within 24 hours and confirm the configuration before you order.
Authoritative references
- ECHA — Diisocyanates (REACH) — mandatory isocyanate training across the EU/CIS PU supply chain.
- OSHA — Isocyanates — PPE and exposure limits for PU spraying.