Introduction
The conveying hose is the component through which every tonne of a Feldbinder silo trailer’s payload physically passes. On horizontal EUT series trailers, the pneumatic hose carries granulate or bulk material from the discharge nozzles to the delivery point, while a separate compressor hose supplies compressed air from the compressor unit to the discharge line. On tipping silo trailers of the KIP (Kippsilo) series — where the tank is raised hydraulically and pneumatic discharge is further assisted by pressure — hoses operate under elevated working pressures and must withstand both abrasion and high compressor-air temperatures.
From a Feldbinder service perspective, hose selection always starts with the medium. Cement, sand or PE/PP granulate in an abrasive application requires a thick, antistatic wall; foodstuffs in food-grade EUT 316L variants require an FDA-approved hose; the hose between the compressor and the trailer requires the CONTI high-temperature design with steel helix. PHS Magnum stocks the full range: from standard warehouse items through to specialist hoses on next-day direct delivery, covering DN25–DN110.
Specifications and materials
Hoses for abrasive materials (black bore)
| Property | DN75 standard | DN75 reinforced |
|---|---|---|
| Application | Cement, sand, gravel, chalk, industrial powders | As above (higher-duty applications) |
| Inner layer | SBR/NR rubber, antistatic (copper bonding wire) | BR/NR rubber, antistatic (copper bonding wire) |
| Outer layer | Synthetic rubber, textile braid | Synthetic rubber, textile braid |
| Wall thickness | 9 mm | 11 mm |
| Temperature range | -40 °C to 80 °C | -30 °C to 80 °C |
| Working pressure | max. 6 or 8 bar (depending on version) | 12 bar |
| Standard | — | DIN 53516 |
| Other diameters | DN100 (102 mm) | DN100 (102 mm) |
FDA food-grade hose (white bore)
| Property | DN75 FDA |
|---|---|
| Application | Grain, sugars, foodstuffs, light abrasive materials |
| Inner layer | NR/BR rubber, antistatic (copper bonding wire), FDA compliant |
| Outer layer | SBR rubber, textile braid |
| Wall thickness | 8 mm |
| Temperature range | -30 °C to 70 °C |
| Working pressure | 5 bar |
| Standard | FDA |
| Other diameters | DN100 (102 mm) |
CONTI high-temperature compressor hose with steel helix (white bore)
| Property | DN75 CONTI |
|---|---|
| Application | Compressor-to-trailer connection; high pressure and temperature |
| Inner layer | EPM/EPDM rubber (white, universal — food and industrial use) |
| Outer layer | EPM/EPDM rubber, textile layer, steel reinforcing helix |
| Wall thickness | 8 mm |
| Temperature range | -40 °C to 180 °C |
| Other diameters | DN50 (51 mm), DN60 (60 mm) |
General-purpose industrial hoses
| Property | DN50 black | DN50 white | DN60 black |
|---|---|---|---|
| Application | Water, air, light abrasives | Universal | Universal |
| Inner layer | EPDM/SBR rubber | EPDM rubber | EPDM/SBR rubber |
| Outer layer | SBR rubber | Textile braid | SBR rubber |
| Wall thickness | 6.5 mm | 8 mm | 6.5 mm |
| Temperature range | -30 °C to 80 °C | -30 °C to 120 °C | -30 °C to 80 °C |
| Working pressure | 12 bar | 6 bar | 12 bar |
| Standard | — | DIN EN ISO 1307 (also DN60) | — |
Sizes and types
- Abrasion-resistant (black): DN75 and DN100 (102 mm) — standard and reinforced.
- FDA food-grade (white): DN75 and DN100 (102 mm).
- CONTI compressor hoses: DN50 (51 mm), DN60 (60 mm), DN75.
- General-purpose industrial: DN50 (black and white), DN60 (black and white).
- Next-day direct delivery, DN25–DN110: Goodyear hot-air hoses (DN50–DN75, with or without helix), stainless steel 1.4571 compressor hoses (3" male BSP thread, DIN 2999, DN80, 10 mm wall, -269 °C to 600 °C, 25 bar, antistatic, lengths 1.8 m and 2.8 m), compressed-air hoses, water hoses and fire-fighting hoses.
Compatibility with Feldbinder silo trailers (EUT/KIP)
- EUT (horizontal, non-tipping) — black abrasion-resistant hose for PE/PP granulate and bulk materials; food-grade 316L stainless steel variants require a white FDA-approved hose. The CONTI compressor hose connects the compressor unit to the discharge line.
- KIP (Kippsilo, tipping) — with hydraulic tank lifting and pressure discharge, reinforced versions are recommended (11 mm wall, 12 bar) together with a compressor hose rated for the appropriate temperature range.
Hose selection is matched to the diameter of the existing Storz couplings and clamps on the specific trailer unit — when ordering, please state the DN size and the fitting type. Full catalogue: spare parts .
Common hose faults on Feldbinder silo trailers
From our Feldbinder service experience, the most frequent hose failures are:
- Wear-through of the inner layer in abrasion-resistant hoses — caused by granulate abrasion; symptoms are reduced throughput and risk of perforation. Solution: upgrade from standard wall (9 mm) to reinforced (11 mm).
- Loss of antistatic bonding — a damaged copper bonding wire creates a risk of static charge build-up; the hose must be replaced.
- Rubber hardening in cold conditions when operating outside the rated temperature range — select a hose with the appropriate range (e.g. CONTI rated to -40 °C).
- Material incompatibility with food-grade media — in food-grade EUT 316L variants, only an FDA-approved hose is permissible; a standard black hose is not acceptable in direct contact with foodstuffs.
- Damage to the steel reinforcing helix in compressor hoses — kinking restricts compressor airflow.
We do not invent service life figures — replacement intervals depend on the medium, working pressure and operational intensity. Diagnostics are carried out as part of our silo trailer service .
Availability and delivery
PHS Magnum’s warehouse in Chorula near Opole holds standard stock of DN50–DN100 hoses (abrasion-resistant, FDA, CONTI, industrial) for immediate collection or dispatch. Specialist items (Goodyear, 1.4571 stainless, fire-fighting) are sourced on next-day direct delivery. Courier delivery throughout Poland and to DACH countries.
Related categories
- Storz coupling system — suction couplings for hose connections
- Clamps and clips — GBS clamps and split-shell clamps
- Non-return valves — in the pneumatic line
- Full spare parts catalogue
- PHS Magnum silo trailer service · Aleksy Pasternak — pasternak.me
See also: This category in the full PHS Magnum network catalogue (all brands) →
Author: Aleksy Pasternak — Managing Partner, PHS Magnum, 20 years in the industry, internal ISO 9001:2015 auditor (DEKRA).
