componente flow control sd - DVG Automation

BYG Direct Gas Actuators Series

BYG actuators are used for on/off control of any natural gas transmission ball or plug valve by means of a high-pressure natural gas or nitrogen actuator supply.
DVG introduce a new generation of patented mechanism which minimizes wearing effect on all loaded & sliding parts, thus extending overall lifespan.


  • Quarter turn SCOTCH YOKE Mechanism
  • Double Acting & Spring return
  • Symmetric or canted yoke design
  • Sweet Gas or Sour Gas supply (H2S<=6% ) up to 105 BARG
  • Output Torque Up to 13.000 Nm
  • Standard temperature range -30°C +93°C
  • Low temperature version -60°C + 93°C
  • PED 2014/68/UE Compliant
  • ATEX 2014/34/UE Compliant
  • IP67M, NEMA 4, 4x & 6 as minimum
  • SIL3 Capable according to IEC 61508
  • Manual Override available
  • Protected travel stops are standard
  • Modular concept
  • Actuator in carbon steel – NO Aluminum NO Cast Iron
  • Pressure retaining components 3.1 Certified according to EN10204
  • Basic control system including Local & Remote control
  • Torque limiting device
  • ESD function for low or high pressure
  • ESD function for electric supply failure to SOV
  • Line Break System
  • Opening prevention for high differential pressure across the valve

Key Features & Advantages

Operating Range
  • The Double-acting models are available with individual test and minimum output torque ranging from 40 Nm (350 lb-in) to 13,000 Nm (115,059 lb-in)
  • The Single acting models develops spring ending torque ranging from 41 Nm (362 lb-in) to 4693 Nm (41536 lb-in)
  • Operating pressure ranges between 15 barg (290 psig) and 105 barg (1600 psig)
  • Standard design construction allows operating temperature from -30 degC (-20 degF) to +93 degC (+199 degF)
  • Low Temperature extended operating range down to -60 degC (-76 degF)
Supply Medium

Sweet Gas – Nitrogen. Special versions are available for Sour Gas or H2

Scotch Yoke

Patented Mechanism which reduced mechanical clearances between cylinder piston rod and driving module.

Mechanism Guide System

Patented Dual Guide Bar hard chromium plated to minimize driving block swing extending piston rod lifespan under heavy load &/or continuous modulating duty.

Symmetric or canted yoke

BY Series is available with either symmetric or canted yoke design depending on valve torque profile demand.

Swept Volume

Reduced gas consumption with higher efficiency

Water ingress protection

Totally enclosed and weather-proof actuator center-body is engineered to meet IP66, IP67 IP67M and NEMA 4 & 4X specifications for high pressure water deluge application.


Cylinder Tube & all structural parts are manufactured in carbon steel material: no cast/grey iron or aluminum parts. All pressure containing part are supplied with 3.1 certificate according to EN10204. Designed according to PED (97/23 CE) directive. Cylinder tube is internally nickel-plated lined (minimum 25µm). Nickel-plating layer can be increased upon request.


Teflon ring with external charging O-ring and internal sealing O-ring prevents sticking phenomena after prolonged operation-less period and ensures reduced hysteresis and high sensitivity.


Dual piston PTFE sliding guide. Yoke arm & shaft are mounted with steel Teflon coated bushing to minimize wearing effect and show higher sensitivity.

Spring Module

Fully welded o-ring sealed spring canister module is inherently safe; the DVG Automation adopted system allows safe assembly/disassembly without any risk for the personnel due to residual spring force.


AISI 316 Stainless steel embossed name plate ensures long last information preservation guaranteeing lifetime traceability.

Travel Stops

External travel stops with protective cap ensure precise angular stroke adjustment up to -5deg / +5deg at each end.

Lifting Points

By means of DIN certified eyelet (three or four off lifting point according to center-body size).

Optional Features

Mounting Pad

Accessory mounting pad allows dual side mounting do not require fixing modification in case of rear side assembly.

Manual Override Option

DVG Automation BYG series can be supplied with hydraulic manual override system for both double acting and spring return actuator. Power is provided by operation of local manual hydraulic hand pump. Open and close action can be selected by means of a directional control valve. Hydraulic manual override by means of two separate hand pumps (1 for open and 1 for close) is available.

Write to us

DVG Automation Spa

It is important for us to reach you and understand your needs. Do you have any questions? Fill out the contact form or write to us. We will get back to you as soon as possible.


Write to us


Write to us