HYDROPNEUMATIC CYLINDER

Product catalog summary

Requirements
The coaxial hydropneumatic governor integrates a pneumatic power section with a hydraulic control section to standardize speed and solve space issues in machinery. It features a closed hydraulic circuit with no air-oil contact and offers versions for rod out, rod in, and double adjustment. Speed control devices like quick approach (SKIP N.A.) and stop (STOP N.A.) are available.

Operating Principle
The system uses oil incompressibility to stabilize speed variations in pneumatic cylinders. It allows for quick piece approach, processing speed adjustments, and includes skip and stop valves for controlling movement. An auxiliary tank compensates for volume differences and refills after leaks, with a spring-pressed piston maintaining system pressure.

General Characteristics
Type: Coaxial hydropneumatic unit
Bore: Ø50 – Ø63
Clamps: ISO standard hole center distance
Stroke: Optional (0÷1000)
Working Pressure: 1-10 bar
External Chamber Fluid: Filtered and lubed or dry air
Internal Chamber Fluid: Hydraulic oil
Working Temperature: -10°C to +80°C
Circuit Oil Viscosity: 2.9E at 50°C
Speed Range: 70 – 6000 mm/min
Min. Actuating Pressure: 4 bar for skip and stop valves

Materials of Main Components
Heads: Aluminium
Liner: Calibrated and anodized extruded light alloy
Stem: Chromium-plated steel C43
Piston Gasket: NBR or Viton
Stem Gasket: Polyurethane
Adjusting Units: Nickel-plated brass
Skip and Stop Valves: Aluminium

Coding Key
The coding system identifies the type of hydropneumatic cylinder, including stroke, adjustment type, governor size, and additional features like skip and stop valves.

Maintenance
The system requires monitoring of hydraulic oil levels to prevent cavitation or air bubbles. Oil should be topped up through a dedicated valve, with excess oil ejected via a drain hole.

Contact Information
TECNOFLUID ENGINEERING srl, Via Dei Mille,1 20031 CESANO MADERNO (MB), TEL. 0362.645981, FAX 0362.645999, e-mail [email protected], www.tecnofluid.info

Catalog excerpts

HYDROPNEUMATIC CYLINDER CO TYPE

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Requirements The coaxial hydropneumatic governor consists of a pneumatic power section and a hydraulic control section. This device is used to adjust and standardise speed; if installed, it makes it possible to solve any space problems in the machines. The hydraulic circuit is closed, without any air-oil contact; the versions listed below are available: - adjustment with rod out - adjustment with rod in - double adjustment All versions can be provided with a speed control device: - quick approach (SKIP N.A.) - stop (STOP N.A.) Operating principle This system exploits oil incompressibility: flowing...

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General characteristics: Coaxial hydropneumatic unit Type Bore Stroke Working pressure External chamber fluid Internal chamber fluid Working temperature Circuit oil Min. and max. speed Min. actuating pressure of skip and stop valves Hole center distance according to ISO standards, on front and rear flanges Optional (0÷1000) 1-10 bar Filtered and lubed or dry air Hydraulic oil -10°C +80°C Hydraulic oil, viscosity: 2.9E – 50°C 70 – 6000 mm/min 4 bar Materials of main components: Heads Liner Calibrated and anodized extruded light alloy Stem Piston gasket Stem gasket Adjusting units Skip and stop...

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The example above shows the coding of a double-acting CO hydropneumatic cylinder (stem out + in control), provided with speed governors, skip + stop valves, Ø50 bore and 150mm stroke. 2 : GOVERNOR ONLY 4 : GOVERNOR + SKIP 5 : GOVERNOR + STOP 6 : GOVERNOR + SKIP + STOP 1 : SYSTEM OUT ADJUSTMENT 2 : SYSTEM IN ADJUSTMENT 3 : SYSTEM IN/OUT ADJUSTMENT

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Overall dimensions of the Ø50 governor:

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Overall dimensions of the Ø63 governor:

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Force table (N): Force table in N Cylinder consumption table in NL (1 cm of stroke): Cylinder consumption table in NL (1 cm. of stroke)

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Maintenance The coaxial hydropneumatic governor is a closed circuit system, and therefore no factors can negatively affect its operation. Be careful with the hydraulic oil level, for it must never drop below the minimum level indicated by the drip stick of the auxiliary tank. Otherwise, cavitation or air bubbles inside the circuit would hinder system regulation. Top-up the oil, if necessary, only through the dedicated unidirectional valve mounted on the rear head, by means of an oil syringe. Excess oil will be ejected through a small drain hole on the tank. TECNOFLUID ENGINEERING srl Via Dei...

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HYDROPNEUMATIC CYLINDER

HYDROPNEUMATIC CYLINDER

Catalog excerpts

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