What does Feldbinder EUT stand for and how does it unload?

EUT is a horizontal pneumatic silo tank made from stainless steel (304L or 316L). Unloading is pneumatic: compressed air (0.3–0.5 bar) is forced through aeration pads on the tank floor, fluidising the bulk material, which is then conveyed through the bottom discharge spout to the receiving silo. The tank stays horizontal and sealed throughout.

What is the main structural difference between EUT and KIP?

EUT uses pneumatic aeration and a sealed stainless steel tank – ideal for fine powders and granules requiring contamination-free transport. KIP (Kippsilo) is an aluminium pressure silo with a hydraulically tipping body that tilts to about 45–50° on a rear hinge; it discharges pneumatically (around 2 bar) with the tipping motion assisting complete emptying. KIP is built for heavy, poorly-flowing dusty materials such as cement, lime, fly ash and powders.

Which Feldbinder trailer requires ISO 9606-1 certified welders for repairs?

All Feldbinder EUT trailers with stainless steel tanks (304L, 316L), especially food-grade and pharmaceutical versions. EN ISO 9606-1 certification (material group 8 – austenitic stainless) is mandatory for any tank welding repair. PHS Magnum employs certified welders and issues WPS (Welding Procedure Specification) documentation.

How often should a Feldbinder EUT or KIP trailer be serviced?

EUT: valve and aeration pad inspection every 12 months or 120,000 km; TDT pressure vessel inspection every 2 years. KIP: hydraulic cylinder and hinge inspection every 12 months; weld inspection every 2 years. Both types require immediate attention if leaks, structural cracks, or abnormal operation are detected.

30.12.2023

Feldbinder EUT vs KIP Trailer – Differences and Service

Name: PHS Magnum
Address: ul. Kościelna 9, Chorula, Opolskie, 47-316, PL
Telephone: +48 602 716 551
Price range: $$

In Brief

Feldbinder EUT and KIP are two fundamentally different bulk trailer types — EUT is a horizontal pneumatic silo with an aerating floor in food-grade stainless steel; KIP is an aluminium pressure silo with a hydraulically tipping body and pneumatic discharge assisted by tipping. They differ in tank material, unloading principle, typical cargo and service requirements. PHS Magnum in Chorula services both: stainless steel welding and valve overhaul for EUT; hydraulic cylinder and hinge repair for KIP.

Feldbinder EUT and KIP – Two Approaches to Bulk Transport

Feldbinder Spezialfahrzeugwerke GmbH has been building bulk trailers for decades. The EUT and KIP represent two distinct engineering philosophies for moving dry bulk cargo:

EUT – sealed pneumatic silo, stainless steel, aerating floor
KIP (Kippsilo) – aluminium pressure silo, hydraulically tipping body, pneumatic discharge assisted by tipping

Both carry dry bulk materials, but their suitability, transport conditions and service needs are entirely different. A similar division into two discharge philosophies exists at other manufacturers — see the comparison of Spitzer SF and SK series.

Feldbinder EUT – Aerating Floor Pneumatic Silo

Construction

The EUT is a cylindrical or oval horizontal tank welded from stainless steel plate (typically AISI 304L / 1.4307 or AISI 316L / 1.4404). Tank capacity ranges from 30 to 60 m³ for single-chamber versions; multi-chamber variants exceed 80 m³. The tank is a registered pressure vessel subject to periodic TDT inspection.

Key structural elements:

Aerating floor – textile filter pads or PTFE membrane sections set into the tank floor; compressed air passes through them to fluidise the cargo
Bottom discharge spout – DN100 or DN150 stainless steel spout with bottom discharge valve or butterfly valve; O-ring or flat seal in EPDM, PTFE or food-grade silicone
Pressure relief valve – factory-set, TDT-legalized, positioned at the top of the tank
Manhole and fill dome – top-entry, gasket-sealed, with dust filter

How It Unloads

The tractor’s compressor pressurises the sub-floor plenum (0.3–0.5 bar)
Air passes through the aeration pads and fluidises the bulk cargo
The fluidised material flows like a liquid toward the discharge spout
Internal tank pressure (up to 1.5–2.0 bar during pneumatic conveying) transfers the material through a flexible discharge hose to the receiving silo

The entire unloading cycle takes place inside a sealed, pressurised tank with no contact between cargo and external atmosphere — which is the fundamental advantage for food and pharmaceutical transport.

Typical Cargo for EUT

Polyethylene (PE) and polypropylene (PP) granules
Flour, starch, icing sugar
Mineral powders: chalk, kaolin, talc
Dry pharmaceutical bulk
PVC, ABS and other thermoplastic granules

Food-contact versions of the EUT must meet Ra ≤ 0.8 µm surface roughness (ISO 4287) and EC Regulation 1935/2004 or FDA 21 CFR requirements for food-contact materials.

Feldbinder KIP – Tipping Aluminium Pressure Silo

Construction

The KIP (Kippsilo) is an aluminium pressure silo trailer with a hydraulically tipping body mounted on a chassis with a rear hinge pivot. According to the manufacturer the series covers a capacity range of 38–66 m³ (feldbinder.com). It is a pressure vessel: discharge is pneumatic, and the tipping motion assists complete emptying of poorly-flowing materials.

Key structural elements:

Telescopic or pivot hydraulic cylinder – lifts the front of the body to a tipping angle of about 45–50°
Rear hinge assembly – the pivot point around which the body rotates; bronze or polymer bushings, grease nipples
Discharge piping and pneumatic valves – pressurised discharge line with seals and valves
Hydraulic system – pump (tractor PTO or on-board electric pump), control valve, hydraulic lines, cylinder

How It Unloads

The hydraulic cylinder extends and lifts the front of the body to about 45–50° tipping angle
Compressed air (around 2 bar) aerates the cargo and builds transport pressure inside the sealed tank
The material flows under pressure to the discharge line, with the tipping motion ensuring complete emptying of residue
After emptying, the body lowers back to the chassis and is locked by mechanical latches

KIP combines a hydraulic system (tipping) with a pneumatic installation (pressure discharge). The tipping motion helps discharge poorly-flowing materials that do not fully empty from a horizontal tank.

Typical Cargo for KIP

Cement and lime – heavy, poorly-flowing construction materials
Fly ash – power-generation by-product transported in bulk
Chemical powders with poor flow – after compatibility verification
Dusty materials prone to caking, where tipping assists discharge

Service Differences: EUT vs KIP

Component	EUT (pneumatic)	KIP (tipping, pressure)
Discharge valve / gate	Bottom spout DN100–150, valve seal, butterfly valve	Discharge piping, pneumatic valves, seals
Aeration pads	Replace every 3–7 years or on damage	Aeration assisted by tipping
Hydraulic system	Not applicable (or auxiliary only)	Telescopic cylinder, pump, lines, seals
Rear hinge / tipping pivot	Not applicable	Inspect every 12 months, bushing replacement
Tank welding	Certified welder ISO 9606-1 (stainless)	Aluminium welding (pressure vessel)
Pressure vessel inspection (TDT)	Mandatory (pressure vessel)	Mandatory (pressure vessel)
Passivation after repair	Mandatory for food-grade versions	Not applicable (aluminium)

Common EUT Faults

Valve seal leak – worn EPDM or PTFE seal at the discharge spout. Sign: product residue outside the tank at the spout after unloading. Repair: 2–4 hours.
Aeration pad failure – torn membrane or blocked pad. Sign: uneven fluidisation, cargo bridging. Repair: demount floor sections, replace aeration pads.
Weld corrosion – particularly at seams on tanks carrying products containing chlorides, or after inadequate passivation post-repair. Repair: 304L/316L welding + passivation + Ra measurement.
Pressure relief valve – service and re-legalisation at each TDT inspection.

Common KIP Faults

Hydraulic cylinder oil leak – worn cylinder seals. Sign: oil trace on the chassis or cylinder rod. Repair: seal kit replacement or cylinder overhaul.
Rear wall / hinge weld crack – high stress concentration at the rear wall and hinge zone. Repair: structural aluminium welding with documentation.
Worn hinge bushings – body play, uncontrolled tipping. Repair: replace bronze or polymer bushings, full hinge kit if required.
Discharge line seal failure – worn seals on the discharge piping or pneumatic valves. Sign: product residue after unloading. Repair: seal replacement.

Which Trailer to Choose – EUT or KIP?

Choose EUT when:

Cargo is fine-grained (flour, PE/PP granules, icing sugar, starch)
The receiving site uses a silo with pneumatic conveying
Hermetic, contamination-free transport is required (food, pharma)
Documentation of tank cleanliness is required by the shipper

Choose KIP when:

Cargo is heavy and poorly-flowing (cement, lime, fly ash, dusty powders)
Material does not fully empty from a horizontal tank and needs tipping assistance
Pneumatic discharge to receiving silos is required
You transport materials prone to caking