RV-Series: Rotary Vane Valve...

ADDRESS

13078 84th Ave, Surrey, BCCanada V3W 1L2

CONTACT

T (604) 594 3461F (604) 599 8494

EMAIL

[email protected]

Emerson • Shafer

RV-Series:Rotary VaneValve Actuators

E M E R S O N . C O N S I D E R I T S O L V E D .

For quarter-turn valvesin critical applications.

� Full open/close operation of ball and plug valves or other90° rotation equipment.

� Quarter-turn valve applications on natural gas pipelines.The actuators are typically powered by natural gas usinggas over oil tanks.

– Emergency Shutdown – Linebreak Protection– Station Blowdown – Two-Way Remote Control– River Crossings – Station By-Pass– High/Low Pressure Shut-off – Engine Loading/Unloading

� Quarter-turn valve control on crude oil or products pipelineswith the actuators powered hydraulically or by nitrogenstorage vessels.

� The Rotary Vane’s concentric mounting, small size andbalanced weight make it perfect for high vibration applications.

– Slurry Pipeline Valves– Pumping Station Valves– Compressor Station Valves

� The Rotary Vane is ideal for offshore platform applicationswhere the actuator's compact size and weight are primarybenefits.

� Cryogenic or extremely low temperature applications.

� Subsea valve control at depths up to 1000 meters.Reference: “Subsea Valve Control Systems” Bulletin

� High speed applications with stroking times as fast as 250milliseconds. Reference: “HS-Series” Bulletin

APPLICATIONS

ShaferRV.Series hpc 5/19/03 2:50 AM

Opposite chambers in the actuator areconnected by pressure equalizing passagesin the upper and lower heads. In this manner,the actuator produces perfectly balancedtorque as hydraulic force simultaneouslypushes both of the rotor vanes away fromthe stationary shoes.

Torque output of the rotary vane actuatorremains constant throughout the full rotationof the valve. Constant torque output is anespecially important feature in high flowapplications, plug valve applications, and forvalves which have rotating seats.

Constant torque output ensures that yourspecified safety factor will not diminish atvarious positions during the valve stroke.

Multiple actuator sizescover a broad torque range.

� Torque output range:1,000 to 6 million in-lbs. (113 to 677,907 N-m)

� Power supply pressure range:100 to 3,000 psi (6.9 to 206.8 bars)Hydraulic, gas/hydraulic

� Ambient temperature range:-20°F to 250°F (-29°C to 121°C) Standard-76°F to 250°F (-60°C to 121°C) Optional

CAPABILITIES

0 10 20 30 40 50 60 70 80 90

DEGREES OF VALVE ROTATION

AC

TUAT

OR

TORQ

UE

OU

TPU

T

PRINCIPLE OF OPERATION


The ideal torque couple. The rotary vane system models an ideal torque couple. Theresultant force vectors acting on the vanes are always parallel,equal in magnitude and opposite in direction.

The two opposing forces form a couple and the couple is themost efficient form of producing rotation.

The rotary vane actuator, by design, will not generate anydestructive side loading forces. The actuator will simplyproduce balanced torque.

CONSTRUCTION

Carbon Steel Upper Head

Pressureequalizing

passages inthe upper and

lower heads.

Cast Iron Stationary Shoe

Shoe Seal

Vane Seal

Adjustable Travel Stop

Carbon SteelLower Head

Bronze Rotor Bearing

Bronze Wear Pads

Carbon Steel Body

Carbon Steel Rotor/Vane Module

ShaferRV.Series hpc 5/13/03 11:41 PM

Proven reliabilitybacked by a10 year warranty.

PERFORMANCE FEATURES

� Simplicity of design with only one moving part allows for alife expectancy of 50 years with minimal maintenance.

� The rotary vane is the most compact type of quarter-turnactuator available.

� The double vane design will not generate any side loadingforce on the valve stem or actuator bearings. Unlike othertypes of actuators, there is no gearing or scotch yokemechanism which require internal power absorption duringthe stroke.

� The rotary vane supplies balanced and constant torque overthe full 90 degrees of rotation.

� Externally adjustable travel stops absorb all end of stroketorque to protect the valve.

� The actuator withstands heavy vibration because thecompact body is centered directly over the valve stem withits weight equally distributed around the valve flange.

� The complete actuator is designed for high pressure.Regulators, pressure reducing valves or relief valves aregenerally not required in the power supply circuit.

� Valve response is always instant, always smooth, andalways dependable.


SEQUENCE 1

The actuator may be powered by a hydraulic power unit,stored gas pressure or natural gas pressure from a pipeline.In this illustration, the actuator is fitted with gas hydraulictanks and is powered by gas pressure. In the first sequence,the actuator is in the open position. There is no pressure inthe actuator or tanks.

SEQUENCE 2

The actuator control system is used to admit high pressuregas into the closing gas hydraulic tank. The pressurized gas inthe tank forces hydraulic fluid into the actuator’s closing port.Pressure equalizing passages allow both closing quadrants tobe pressurized simultaneously providing balanced torque asthe vanes push away from the stationary shoes. The actuatoris rotating clockwise.

SEQUENCE 3

When the actuator reaches the fully closed position, the con-trol system will allow all remaining pressure in the tank to ventto atmosphere, thus neutralizing the pressure in the tank andactuator.

OPERATING SEQUENCE

High Pressure Gas

Pressurized Hydraulic Fluid

Non-Pressurized Hydraulic Fluid


At Shafer we design, build and test the complete valve controlsystem, including the actuator, controls and accessories.When you specify Shafer, you receive a complete valve operat-ing system, factory tested, field proven and guaranteed.

RV-Series actuators can be operated locally, remotely, or auto-matically by a variety of sensory and control devices. We havedeveloped over 4000 individual control systems to meet themany requirements of our customers.

� TYPICAL CONTROL SYSTEMS

– Local Manual

– Remote Two-Way Electric

– Linebreak Protection, Sensing Rate of Pressure Drop

– Emergency Shutdown or Fail-Safe

– High/Low Pressure Shutoff

All accessories used by Shafer have undergone thorough testingand field evaluation to ensure their performance as part of alarger system.

COMMON ACCESSORIES

– Manual Hydraulic Hand Pump

– Control Valves, Pneumaticand Hydraulic

– Sensors for TriggeringAutomatic Operation

– Power Storage Vesselsand Power Supply Units

– Limit Switches andPosition Transmitters

– Speed Controls

– Regulators

– Filters

CONTROLS AND ACCESSORIES


Shafer2500 Park Avenue WestMansfield, Ohio 44906T 419-529-4311F 419-529-3688

[email protected]

www.EmersonProcess.com/Shafer © 2003, Emerson Process Management. All rights reserved.

The Emerson logo is a trade mark and service mark of EmersonElectric Co.

The contents of this publication are presented for informationpurposes only, and while effort has been made to ensure theiraccuracy, they are not to be construed as warranties or guarantees,expressed or implied, regarding the products or services describedherein or their use or applicability. All sales are governed by ourterms and conditions, which are available on request. We reservethe right to modify or improve the designs or specifications of ourproducts at any time without notice.

Bulletin RV-0294 Rev: 4/03

QUOTATIONS

For additional information or quotations, please contact one of our sales engi-neers or your local Shafer representative. To assist us in responding to yourinquiry, please have as much of the following information available as possible.

� Application Description:General description of the actuator requirements and valve control function.

� Valve Description:Manufacturer, size, type, rating, model, stem diameter, maximumdifferential pressure, torque requirements, stroking speed requirements,and the valve's operating temperature range.

� Actuator Power Supply:Hydraulic, gas/hydraulic.Pressure range of the power supply.

� Control Description and Accessories:Description of the actuator control function. Pilot pressures, electrical sup-ply voltages, pressure sensing requirements, etc., where applicable.Requirements for position indication, emergency manual operation, speedcontrol, power supply filtration, etc.

� Environment:Ambient temperature range.Corrosion considerations.


RV-Series: Rotary Vane Valve...

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