componente flow control LAP - DVG Automation

LAP Pneumatic & LAH Hydraulic Actuator Series

DVG Automation “LA” linear actuator series are compact in design and are suitable to operate every type of linear valve either in modulating or heavy-duty services.
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Specifications

  • Compact design
  • Suitable to operate every type of linear valve
  • Double acting & Spring return
  • Pneumatic power supply (up to 12 Barg)
  • Hydraulic power supply (up to 350 Barg)
  • ON-OFF or Modulating Service
  • Output Trust up to 1.500.000 N (Cylinder)
  • Output Trust up to 300.000 N (Spring)
  • Standard temperature range -30°C +90°C
  • Low temperature version -60°C + 90°C
  • PED 2014/68/UE Compliant
  • ATEX 2014/34/UE Compliant
  • IP67M, NEMA 4, 4X & 6 as minimum
  • SIL3 Capable according to IEC 61508
  • Corrosion resistant cylinder
  • Standard travel stops protected
  • Hydraulic manual override / Dumping System
  • Coupling joint in stainless steel
  • Pressure retaining components and power springs 3.1 Certified according to EN10204

Key Features & Advantages

Operating Range
  • Pneumatic operating pressure for the LAP pneumatic series ranges between 3 barg (45 psig) to 12 barg (175 psig)
  • Standard design construction allows operating temperature from -30 degC (-22 degF) to +93 degC (+199 degF)
  • Low temperature option extends operating range down to -60 degC (-76 degF)
Supply medium
  • Instrument air, nitrogen, sweet gas. Special version available for sour gas.
  • Hydraulic operating pressure for the LA hydraulic Series ranges between 20 barg (290 psig) to 350 barg (5.000 psig)
  • Standard design construction allows operating temperature from -30 degC (-22 degF) to +93 degC (+199 degF)
  • Low temperature option extends operating range down to -60 degC (-76 degF)
  • Hydraulic oil mineral based . Special versions are available for water based fluids
Externali Tie Rod

External tie-rods, coated with a zinc based chemical layer which resists 500 – 1000 hours of salt fog, maintain cylinder integrity.

Water ingress protection

Totally enclosed and weather-proof actuator is engineered to meet IP66, IP67, IP67M and NEMA 4 & 4X specifications.

Materials

Cylinder Tube & all structural parts are manufactured in carbon steel material: no cast/grey iron or aluminium. All pressure containing parts are supplied with 3.1 Certificate according to EN10204. Designed according to PED (97/23 CE) Directive.

Corrosion prevention

Cylinder tube is internally nickel-plated lined (minimum 25µm). Nickel-plating layer can be increased upon request.
External coating provides higher reliability in harsh environmental conditions as per ISO 12944 (Expected Durability) and in compliance with NORSOK M-CR-501 requirements.
Hard chromium plated piston rod in alloy steel, or stainless steel upon request, for corrosion resistance and minimum friction on dynamic seal.

Seal

Piston seal design prevents sticking phenomena after prolonged operation-less period and ensures reduced hysteresis and high sensitivity.

Labelling

316 Stainless Steel embossed name plate ensures long lasting information preservation, thus guaranteeing lifetime traceability.

Travel stops

External travel stop with protective cap ensures precise upward linear stroke adjustment whilst downward stroke adjustment is carried out using the stem coupling joint.

Stem coupling

Coupling joint in stainless steel.

Visual indicator

Visual indicator to show the exactly stem valve position stroke, mounted on the stem coupling joint, is available upon request.

Lifting Points

By means of DIN certified eyelet.

Optional Features

Manual Override Option

Handwheel Jackscrew is available where force demand permits. A separate upward stroke travel stop adjustment screw is maintained thus avoiding any inaccurate positioning of the valve automated package. Jackscrew offers the following benefits:

  • Available with declutchable and locking devices to avoid spurious actuator operation;
  • Hydraulic Hand pump to operate the valve in absence of power supply.
  • Hydraulic manual override is mounted directly on actuator cylinder and includes:
  • Hand-pump, directional control valve, oil tank, relief valve & check valve (for single acting units).

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