Why is the DP series the right choice for steelworks and hot rolling mills?

The DP series to ISO 6022 is the primary choice for steelworks thanks to its 250 bar nominal pressure (375 bar test to ISO 10100) and rugged construction. According to the manufacturer it is suited to rolling stands, forging presses and handling systems in steelworks — that is, environments with high temperatures, contaminants and intense mechanical stress, under significant side loads and in the presence of abrasive dust and corrosive agents.

What nominal and test pressure does the DP series for steelworks have?

The heavy-duty DP series to ISO 6022 runs at a nominal pressure of 250 bar and is 100% tested at 375 bar to ISO 10100. The bore range is Ø 50–200 mm, the maximum stroke is 6000 mm and the reference force reaches 730 kN, which makes it ideal for hot rolling mills, forging presses and heavy handling in steelworks.

Which applications in power generation and steelworks are the cylinders suited to?

Typically hot rolling mills, foundries, ingot and slab handling, ladle tilting and tapping, forging presses and hydraulics in power generation — controlling valves and dampers and operating boilers and turbines. Everywhere where high force, resistance to heat and dust, and a long service life under continuous operation are decisive.

How do DP cylinders withstand the abrasive dust and corrosive agents of steelworks?

The DP series is, according to the manufacturer, designed for environments with abrasive dust and corrosive agents. For machines exposed to corrosion and abrasion, the DP is fitted with an RM metal scraper, an H seal (Viton FKM) up to 150 °C and a corrosion-resistant RRX / RRK rod.

When should you choose the TP servo cylinder in a foundry or steelworks?

The TP servo cylinder to ISO 6022 with integrated position feedback is chosen where rod position control and repeatability are required — heavy-duty automation, foundries, steelworks and forging presses with synchronised movements. It shares the heavy-duty construction of the DP, so it withstands an equally demanding operating environment.

What are the HD / HK flange-mounted cylinders used for in power generation?

HD / HK flange-mounted cylinders to ISO 6020/2 (210 bar, 315 bar test, Ø 50–200 mm, stroke up to 4000 mm) are the secondary choice for very long strokes — they eliminate tie-rod stretch under load and maintain geometric stability. In power generation they are used to control valves and dampers.

Which seals should be chosen for the hot environment of steelworks?

Four configurations are available: S (high seal up to 0.5 m/s), L (low friction PTFE up to 1 m/s), H (Viton for oil temperatures up to +150 °C, typical for hot rolling mills and around furnaces) and G (PTFE CG for HFC fluids). For hot and dusty workplaces, the usual choice is the H variant with a metal scraper ring.

Can the cylinders be supplied with adjustable end-of-stroke cushioning?

Yes. Adjustable hydraulic cushioning is particularly important on heavy cylinders for ingot and slab handling — the K variant cushions at both ends, V cushions on extension only and Z on retraction only. Cushioning protects the construction from impacts at the end of travel and is recommended for steelworks and foundries.

Are the cylinders 100% tested and what about service life?

Every cylinder undergoes a 100% pressure test to ISO 10100 (DP test pressure 375 bar). The bronze rod guide bushing and adjustable end-of-stroke cushioning extend service life in the continuous operation of steelworks, hot rolling mills and power generation.

Hydraulic cylinders for power generation and steelworksDP (ISO 6022, 250 bar) · TP servo · HD / HK (ISO 6020/2)

For steelworks, hot rolling mills, foundries and hydraulics in power generation, the primary choice is the heavy-duty DP double-acting hydraulic cylinder to ISO 6022 — nominal pressure 250 bar, 375 bar test to ISO 10100, bore Ø 50–200 mm, stroke up to 6000 mm and a 730 kN reference force. The DP withstands high temperatures, abrasive dust, corrosive agents and significant side loads. The TP servo cylinder controls rod position in foundries and forging presses; flange-mounted HD / HK cylinders to ISO 6020/2 (210 bar) handle very long strokes and the control of valves and dampers. Supplied by hydraulika.store, an authorised distributor of Conforti Oleodinamica for the Czech Republic, Slovakia and the EU — with an online configurator, free CAD models and delivery within 14 working days.

250 barDP · ISO 6022 (nominal)

375 barTest pressure (ISO 10100)

730 kNReference force (DP)

up to 6000 mmMaximum stroke (DP)

Configure a cylinder CAD 3D models

HD / HK catalogue (PDF) DP catalogue (PDF)

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DP · ISO 6022 · 250 bar

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HD / HK · ISO 6020/2 · 210 bar

ISO 6022 Steelworks Heavy-duty 250 bar Power generation

Controlling rod position in a foundry or steelworks? For synchronised movements, repeatability and precise continuous position control, use the TP servo series to ISO 6022 with integrated feedback. It shares the heavy-duty construction of the DP, so it withstands the equally demanding environment of forging presses and foundries. More about TP servo cylinders →

Are corrosive agents and abrasive dust acting on the cylinders? The DP series withstands demanding environments — an RM metal scraper against dust and abrasion, an H (Viton FKM) seal up to 150 °C and a corrosion-resistant RRX / RRK rod. Ideal where a standard chromed rod is not enough. More about DP / TP cylinders (ISO 6022) →

Frequently asked questions

FAQ on DP, TP and HD / HK cylinders for steelworks and power generation

Click a question — the answer appears below. Verified against the technical documentation of Conforti Oleodinamica.

Useful articles from our Technical Centre: Interchangeability of competitor cylinders to ISO → Cylinder assembly, maintenance and service — Conforti KIT → Modular vs. welded hydraulic cylinders → All articles in the Technical Centre →

Online configurator

Configure your DP, TP or HD / HK hydraulic cylinder online

Choose the series, mounting, bore and stroke. The configurator computes the extension and retraction force and the required oil flow, shows the 3D model and generates the cylinder configuration code (SKU) for steelworks, foundries and power generation.

Configurator not loading? Open the configurator in a new tab →

Technical specifications

Technical specifications of DP, TP servo and HD / HK

The heavy-duty DP to ISO 6022 (250 bar) and the TP servo as the primary solution for steelworks, hot rolling mills and foundries; flange-mounted HD / HK to ISO 6020/2 for long strokes and valve control. Rugged construction resistant to heat, dust and corrosion for continuous operation.

Standard

DP / TP: ISO 6022 · HD / HK: ISO 6020/2

Heavy-duty (DP/TP) and flange-mounted (HD/HK) construction

Operating pressure

DP: 250 bar · HD / HK: 210 bar

DP 375 bar test to ISO 10100 (100%)

Bore

HD: Ø 50–100 mm · HK: Ø 125–200 mm

DP: Ø 50–200 mm (incl. Ø 140 mm)

Maximum stroke

DP: up to 6000 mm · HD / HK: up to 4000 mm

HD / HK for long strokes and valve control

Rod and guide

DP thicker rod · bronze rod guide bushing

Side-load resistance; corrosion-resistant RRX / RRK rod

Seals

S · L (PTFE) · H (Viton) · G (HFC)

H for oil temperatures up to +150 °C (hot rolling mills, furnaces)

Three solutions for power generation and steelworks

When to choose DP, TP servo or HD / HK?

The heavy-duty DP (ISO 6022, 250 bar) is the primary series for steelworks, hot rolling mills and forging presses — it withstands abrasive dust, high temperatures and corrosive agents. The TP servo controls rod position in foundries and forging presses. Flange-mounted HD / HK (ISO 6020/2, 210 bar) are the secondary choice for very long strokes and the control of valves and dampers in power generation.

HD / HK seriesISO 6020/2 Flange-mounted · 210 bar · Ø 50–200 mm · stroke up to 4000 mm. Long strokes, geometric stability, control of valves and dampers. HD / HK series detail → DP seriesISO 6022 Heavy-duty · 250 bar (375 bar test) · 730 kN · thicker rod. Steelworks, hot rolling mills, forging presses, abrasive and corrosive environments. DP series detail → TP servoPositioning Heavy-duty servo with position feedback. Foundries, steelworks, forging presses — position control and repeatability. TP servo cylinder detail →

Applications in power generation and steelworks

Where cylinders for steelworks and power generation are most often used

Hot rolling mills, foundries, ingot and slab handling, ladle tilting and tapping, forging presses and hydraulics in power generation — controlling valves and dampers, operating boilers and turbines, gates and weirs at hydroelectric plants. Everywhere where high force, resistance to heat, dust and corrosion, and a long service life under continuous operation are decisive. The primary choice is heavy-duty ISO 6022 (DP) and the TP servo; for long strokes the flange-mounted HD / HK follow on.

Need help choosing a cylinder for your application?

CAD & technical documentation

CAD models and 2D drawings of DP, TP and HD / HK cylinders

Download the 3D model or 2D drawing for a precisely configured cylinder for steelworks, foundries or power generation. The model matches the bore, rod, mounting and stroke from the configurator. Formats STEP, IGES, Parasolid, STL, DWG, DXF and PDF free of charge.

How to get a 3D model or drawing of a DP / TP / HD / HK cylinder

1
Configure the cylinder — choose the series, bore, rod, mounting and stroke in the configurator above
2
Open the 2D / 3D model section — after adding the product to the quote, the configuration code (SKU) is shown
3
Enter the configuration code (SKU) — paste the cylinder code into the "CODE WIZARD" and confirm the configuration
4
Choose a format and download — STEP, IGES, Parasolid, DWG, DXF and more

Available formats:

STEPIGESParasolidSTLDWGDXFPDF

CAD models and technical documentation by series

3D models and drawings HD / HKISO 6020/2 flanges · long strokes, valve control

3D models and drawings DPISO 6022 · 250 bar · steelworks, hot rolling mills, forging presses

3D models and drawings TP servoISO 6022 servo · position control in foundries and steelworks

Position sensing

Position sensing options for hydraulic cylinders

End positions

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SPV / SPZ / SPK proximity switches →

Full stroke

Servo cylinders TH / TX / TP →

For a comparison of all position-sensing methods, technical parameters and selection guidance, see Position sensors for hydraulic cylinders →

Brand authority

Why Conforti through hydraulika.store

We are an authorised distributor of the Italian manufacturer Conforti Oleodinamica for the Czech Republic, Slovakia and the EU. For power generation and steelworks we supply DP cylinders to ISO 6022 and TP servo cylinders — resistance to heat, abrasive dust and high pressures. Authorised supply with English-language support.

Authorised distributor

Genuine Conforti cylinders with the full manufacturer's warranty. No re-exports or aftermarket parts. Direct distribution agreement.

High-pressure ISO 6022 standard

The DP series with a 250 bar nominal pressure for steelworks and hot rolling mills — a rugged construction for high and cyclic loads.

ISO 9001 since 2008

Conforti has held an ISO 9001 certified quality management system for 18+ years. Periodically validated business processes.

Dust and corrosion resistance

The DP construction withstands the abrasive dust and corrosive agents of steelworks and foundry operations.

100% individual testing

Every cylinder undergoes an individual test protocol to ISO 10100 before delivery. Records kept on file.

TP servo cylinder for control

Where precise positioning is required in a foundry or steelworks, deploy the TP servo cylinder with position feedback.

Made in Italy

Manufactured in Monza (Lombardy). Proven design to ISO 6020/2 and ISO 6022, DIN 24554 / 24333.

Service and spare parts

As an official distributor we provide direct access to seals, guides and spare parts with a compatibility guarantee.

If you have any questions, please contact us — Adam Tomášek, sales & technical representative and authorized distributor of Italian Conforti Oleodinamica hydraulic cylinders for CZ, SK and the EU since 2023, who prepared this content for you. Contact →