Which spare parts are available?
The sleeve (also referred to as a liner, bladder or rubber hose) is the primary wear part of a pinch valve. Depending on the valve type, flange rings, retaining rings and seal kits may also be available. Ebora supplies sleeves for:
How do you replace a sleeve in a pinch valve yourself?
A pinch valve consists of three main components: the housing, the sleeve and the flange ring or end cap. No special tools are required. In most cases the valve can be disconnected from the pipeline within minutes, the sleeve replaced and the valve reinstalled. On-site maintenance can be carried out by your own technical staff, without the need to call in an engineer.
Why replace only the sleeve and not the entire valve?
The modular design of the pinch valve makes targeted component replacement possible. This provides three direct advantages:
- Lower maintenance costs: you only pay for the worn part
- Shorter downtime: the housing remains in the pipeline, only the sleeve is replaced
- More sustainable asset management: less material consumption, longer overall service life of the installation
This principle applies to all actuation variants — from simple manual operation to fully automated pneumatic control.
Which sleeve materials are available?
The choice of material determines the chemical and thermal resistance of the sleeve. Ebora supplies standard sleeves in natural rubber (NR) from European warehouse stock. For other materials, please enquire about availability and lead time.
Selection guide: which sleeve material for which medium?
| Material |
Suitable for |
Max. temperature |
Abrasion resistance |
| Natural rubber (NR) |
Water, bulk solids, abrasive slurries |
+70 °C |
+ Excellent |
| EPDM |
Hot water, steam, acids, alkalis |
+120 °C |
- Moderate |
| NBR (nitrile rubber) |
Oils, greases, fuels |
+100 °C |
+ Good |
| Neoprene (CR) |
Seawater, ozone, weathering |
+90 °C |
+ Good |
| Silicone (MVQ) |
Food, pharmaceutical applications |
+180 °C |
- Moderate |
Unsure which material suits your application? Provide us with the medium, temperature and DN size — we will advise you on the correct sleeve.
Which sectors require frequent sleeve replacements?
Pinch valves are used intensively in processes involving abrasive or difficult-to-handle media, making periodic sleeve replacement a standard part of preventive maintenance. Sectors with high demand for replacement sleeves include:
- Concrete industry and mining: concrete slurry, cement paste and mining sludge cause rapid sleeve wear due to high abrasivity. Pinch valves are used as shut-off and control elements in bulk material pipelines
- Water treatment and sludge processing: pumping of activated sludge, gravel suspensions and chemically treated wastewater
- Food industry: transport of particle-containing liquids such as juices, purees or beer mash — FDA-compliant sleeve materials are required here
- Chemical industry: aggressive liquids and gases where material selection is critical to the maintenance cycle
- Paper and pulp industry: wood pulp suspensions and bleaching agents with high abrasivity and chemical load
- Agriculture and irrigation: pumping of slurry, crop protection agents and granulate suspensions
Opting for preventive maintenance? Ebora can maintain a dedicated sleeve stock for your installation, ensuring immediate availability during planned shutdowns.
Customer-specific stock on request
For installations with high operating hours or critical processes, Ebora can hold customer-specific sleeve stock. You specify the DN sizes, material and required safety level — we ensure the parts are available when you need them. This prevents unplanned downtime and longer lead times when urgency strikes.
Submit your specifications via the contact form or contact our technical sales team by telephone.
Frequently asked questions
How long do sleeves last in a pinch valve?
Sleeve life depends heavily on the medium and operating frequency. With clean water or non-abrasive liquids, service lives of five years or more are achievable. In the concrete industry or with continuous bulk solid flow, annual inspection and timely replacement are recommended to prevent unplanned downtime.
What information do I need when ordering a replacement sleeve?
For correct supply you need at minimum: the nominal diameter (DN), the sleeve material, the actuation type of the pinch valve (manual, pneumatic or electric) and, where available, the type number or manufacturer. With these details we can quickly identify the correct sleeve and confirm availability.
What is the difference between a sleeve, a liner and a bladder?
In practice these terms are used interchangeably for the same component: the elastomeric tube element inside the pinch valve that carries the medium and provides the seal. Different manufacturers use different names — sleeve, liner, bladder or rubber hose — but they all refer to the same wear part that can be replaced periodically without dismantling the housing.
