One fastening system for the whole fleet — regardless of brand
PHS Magnum has been servicing multi-brand silo trailer fleets since 1990 — and it is precisely this perspective that shapes our approach to hose clamps. A haulier rarely runs a single brand: alongside Spitzer trailers there are Feldbinder, Kässbohrer and vehicles from other European manufacturers. What they share is a common denominator — a pneumatic line with a transfer and compressor hose, Storz suction fittings and a small yet critical component fastening the hose onto the stub.
A hose clamp is a universal part. It is matched not to the logo on the tank but to the hose diameter and the fitting type — which is why the same GBS clamp or shell coupling fits a silo trailer of any brand, as long as the DN and the shape of the Storz end match. For a mixed-fleet manager this is a huge simplification: one shared clamp inventory covers all trailers, with no sorting by brand.
A poorly matched or corroded clamp is the most common cause of blow-by and dusting during discharge — no matter whose logo the trailer carries. That is why we run three basic groups of fastening components: GBS clamps, shell couplings, and worm-drive and double-bolted clamps.
Technical specification
GBS-type hose clamps
| Parameter | Value |
|---|---|
| Application | assembly of industrial and compressor hoses |
| Standard material | fully galvanised steel (W1) |
| Bolt | hexagon, class 8.8 |
| Band width | 18 mm |
| Standard | DIN 3017 |
| Sizes | from 17 mm |
| Direct delivery | full GBS range in stainless and acid-resistant steel (W2, W4) |
Shell couplings
| Parameter | Value |
|---|---|
| Application | mounting smooth suction fittings under shell couplings |
| Set for one hose side (one fitting) | 2 shells, 4 assembly bolts, 4 nuts |
| Material | German aluminium |
| Standards | DIN 2817, DIN 2826 |
| Flagship size (permanent stock) | 75x10 (for DN75 hose) |
| Direct delivery | all sizes and shapes in aluminium and stainless steel (size 75x8) |
Double-bolted and worm-drive clamps
| Parameter | Value |
|---|---|
| Application | assembly of any industrial or automotive line |
| Size range | full |
The three groups cover the entire line: quick GBS clamps for the fitting stub, more secure shell couplings for smooth fittings, and worm-drive and double-bolted clamps for auxiliary lines (air, water, lines around the chassis and compressor).
Compatibility with silo trailer brands
Fastening is matched to the hose diameter and the Storz fitting type, which is why the clamp range covers silo trailers of all the brands we service:
| Brand | Series | Assembly notes |
|---|---|---|
| Spitzer | SF (non-tipping), SK (tipping) | DN75 hose → 75x10 shell couplings; GBS clamps for Storz stubs |
| Feldbinder | EUT (horizontal), KIP (Kippsilo, tipping) | for KIP pressure discharge, DIN 2817 shell couplings are recommended |
| Kässbohrer | K.SSK, K.SSL | matched by hose DN and fitting shape |
| Other European manufacturers | — | size and finish matched to the specific hose and fitting |
The fleet-wide standard is the DN75 hose, for which we keep shell couplings in size 75x10 and GBS clamps matching the outside diameter of the hose with its fitting permanently available. The GBS clamp size (17–130 mm range) is matched to the outside diameter of the hose pushed onto the Storz suction fitting stub. Below is a summary of typical hose diameters and the corresponding Storz fitting sizes assembled with GBS clamps:
| Storz fitting size | Hose diameter | Gasket |
|---|---|---|
| C (52) | 50 mm | black NBR |
| B (75) | 75 mm | black NBR |
| A (110) | 100 mm | black NBR |
| A (110) | 110 mm | black NBR |
The material finish is chosen by working environment, not trailer brand: for typical PE/PP granulate and bulk materials, galvanised W1 is sufficient, while for stainless-steel applications (e.g. food-grade transport, moist media, intensive washing) we select stainless and acid-resistant W2/W4 clamps and stainless couplings.
Warehouse in Chorula
We run the clamp range from the PHS Magnum warehouse in Chorula near Opole, 4 km from the A4 motorway. The stocking principle is practical, not catalogue-driven: we keep in stock what genuinely moves in a mixed fleet — GBS clamps in the standard finish (W1) and 75x10 shell couplings for the DN75 hose — because these decide repair time when a trailer is standing with a leaking connection.
Stainless and acid-resistant finishes (W2, W4), stainless 75x8 couplings, other sizes, and worm-drive and double-bolted clamps are supplied by direct delivery — next day. This way one shared warehouse serves the whole fleet, however many brands it counts. Courier shipping within Poland and to EU countries; collection in person is also possible.
We do not quote made-up service-life figures — clamp durability depends on the medium, assembly frequency and working conditions, not the trailer brand.
What to watch for across brands
Although fastening is matched to the hose and fitting rather than the logo, a few design differences between manufacturers are worth keeping in mind with a mixed fleet:
- Spitzer SF/SK — the DN75 hose is standard, so 75x10 couplings and GBS clamps for Storz stubs move the fastest here.
- Feldbinder EUT/KIP — for pressure discharge on the tipping KIP, DIN 2817 shell couplings tend to be more secure, and food-grade EUT versions require stainless W2/W4 finishes.
- Kässbohrer K.SSK/K.SSL — selection follows directly from the hose DN and fitting shape, with no material specifics beyond the working environment.
- Material by medium, not brand — galvanised W1 is sufficient for PE/PP granulate; for moist media and washing, W2/W4 is used regardless of the trailer manufacturer.
We run the central warehouse in Chorula precisely for this spread: one shared clamp inventory serves all brands, so fastenings for different trailers can be assembled into a single order, without sorting by manufacturer.
Dedicated brand portals
PHS Magnum runs dedicated portals for the most widely serviced silo trailer brands. There you will find the hose clamp catalogue framed from the perspective of a specific series, with assembly notes for the given tank model:
- Spitzer hose clamps (SF/SK) — selection for the non-tipping and tipping series.
- Feldbinder hose clamps (EUT/KIP) — including fastening for Kippsilo pressure discharge and food-grade versions.
To match clamps and couplings to a specific hose, fitting and silo trailer brand, contact the service team: tel. +48 602 716 551. Full service scope: magnumchorula.pl/serwis/.
Related categories
- Pneumatic hoses — transfer and compressor hoses fastened with GBS clamps or shell couplings
- Storz system — Storz suction fittings mounted on the hose
- Non-return valves — silo trailer pneumatic line fittings
- Full spare parts catalogue
Author: Aleksy Pasternak — Managing Partner at PHS Magnum, 20 years in the industry, internal auditor ISO 9001:2015 (DEKRA).
