Category: Industry Trends

90 to 140 vdc, metering valve position control

Meggitt’s 90 to 140 VDC motor controller is  in use on a variety of industrial

gas turbine engines. With millions of field operating hours, this design

continues to prove the high reliability of Meggitt EMA technology.

Specifications

Function:Positioning controller for precision gas fuel metering valves used on

aero-derivative and frame turbine engines.

Type:  Digital pulse-width modulated servo-amplifier

Physical size:   9.625” wide, 8.5” high, 13.55 deep

Weight:  25 pounds

Input voltage: 90 to 140 VDC

Input current: 7.5 amperes maximum

Output current:   0.3 ampere (continuous), 7.0 amperes (peak)

Digital input/output: 0 to 5 VDC

Electrical connections:   Terminal strip, AWG 14 to 22

Communications:

C173455 – serial port interface RS-485; C173455-2 – analog

interface 4-20 ma

Ambient temperature:    0 to 70ºC (32 to 158ºF)

Remote installation:

Up to 60 meters (200 feet) wire run length from the fuel metering valve.

The controller consists of a servo amplifier, an I/O signal noise filter, and

a capacitor, which are packaged in a compact three level unit with readily

accessible interface terminations on its top plate. The servo amplifier is

mounted on a cold plate on the lower level, and the resistor/capacitor

network, inlet EMI noise filter and outlet common mode choke filter are

on the middle level.

Two-inch flange, 24 vdc, solenoid pilot actuated (SPA)

Meggitt’s two-inch poppet style gas flow shutoff valve is in use on a variety

of industrial gas turbines with millions of field operating hours. This product

continues to prove the high reliability of Meggitt design technology.

Key features

• Fail-safe closedlde-energized)

•  Closed positionindicating switch

•  100 msec fail-safeclosing time

• 200 msec opening time

• High temperaturepoppet seal

• For use on both DLE andSAC turbine engines

• Explosion proof design,CSA/UL certified for NECclass 1. division

1. groupsC and D,temp code T4.CE zone 1. EExd lIB.CE-ATEX and PED certified

• All stainless steel valveand yoke materials forNACE compliance

• No maintenance requiredunder normal conditions

Specifications

Function:  Fail-safe fuel gas flow shutoff for gas turbine engines

Physical size: 9.00″ flange to flange, 15.19″ high

Weight: 80 pounds maximum

Flange type:  2″ ANSI B16.5 CL 600 raised face flanges

Line pressure:  0 to 1000 psig

Fluid temperature:  32 to 350°F

Ambient temperature:  –65 to 150°F

Performance

Flow:   0 to 3.5 pounds/sec natural gas, Cv = 55

Leakage:   ANSI class V

Operating time:   100 msec fail-safe closed (de-energized);

200 msec to fully open

Pressure drop

(full open): 11 psid maximum at 80°F and 3.5 pounds/second flow

Electrical

Solenoid:   Continuous duty, 24 VDC nominal (20 to 28 VDC),

2 amperes maximum

Closed position  indicating switch: 28 VDC, 2.5 amperes, 3-wire, SPDT

½-inch port, 24 vdc, solenoid operated

Meggitt’s ½-inch direct solenoid operated gas shutoff valve is designed for

use in fuel gas, air, and liquid control systems. This product offers a very

high degree of reliability in fluid control systems.

Key features

Fail-safe closed orfailsafe open leitheravailable)

• Explosion proof design,CSA/UL, and CE-ATEXcertified

• All steel materials forNACE 2002 compliance

• No maintenance requiredunder normal conditions

• Direct acting design forhigh reliability

• Cv=2.7

Specifications

Function:   Gas shutoff or vent valve for turbine engines

Physical size:  5.75” diameter, 9.81″ high

Weight:  30 pounds

Pipe size:  ½ inch NPT

Line pressure:  0 to 1500 psi–40 to 400°F

Fluid temperature:  Ambient temperature:    –40 to 212°F

Electrical:

Voltage:    24 VDC nominal (20 to 28 VDC range), 1 ampere maximum

at 25 VDC, continuous duty

Position  indicating  C422425 – Normally open valve with open position switch

switch:   C422695 – Normally closed valve with closed position switch

C422685 – Normally open valve without position switch

C422705 – Normally closed valve without position switch

Leakage:  ANSI class VI

Meggitt’s two-inch right angle style gas metering valve is in use on a variety

of aero-derivative gas turbines. With millions of field operating hours, this

design continues to prove the high reliability of Meggitt EMA technology.

Key features

• Exceptional accuracy,1% of flow point

• High speed brushless DCservo motor performance,20 Hz frequency response

• Less than 400 msec fullstroke response time

• Used on both DLE andSAC turbine engines

• Explosion proof design,CSA/UL certified for NECclass 1. division 1. groups C and D,

temp code T4.CE EExd NB, T4. CE-ATEXand PED certified

• All stainless steel valveand yoke materials forNACE compliance

• No maintenance requiredunder normal conditions

Specifications

Function: Precision fuel gas metering for aero-derivative, small and large frame turbine

engine control

Physical size:  5.56″ wide, 10.30″ high, 28.72″ long

Weight:  95 pounds

Flange type:  2″ ANSI B16.5 CL 300 raised face flanges

Line pressure:  0 to 700 psia

Fluid temperature:  –40 to 300°F

Ambient temperature:  –65 to 220°F

Performance:

Internal leakage:  ANSI class IV

Operating time:  Less than 400 msec full stroke response, 300 msec failsafe closed

Electrical:

Motor:  Steady state, 90 to 140 VDC, 0.30 ampere; 7.0 amperes maximum peak

Resolver:  4 VAC, 25 to 60 ma maximum

LVDT:  Excitation, 7.07 (±0.14) volts rms, 3000 (±300) Hz

Thermostat:  Opens at 329 to 347EF; resets at 251 to 270EF

Variations:  Outlet orientation direction optional, flow ranges from 80 to 22.000 pph

VibroSmart distributed monitoring system

A VibroSmart ® distributed monitoring system

(DMS) is a network of small and economical

modules providing measurement,

communications or other functions that are

connected together in distributed, networked

measurement blocks in order to provide the

functionality normally offered by rack-based

machinery monitoring systems. A VibroSmart

system consists of one or more measurement

blocks, each containing up to sixteen VibroSmart

modules, a power supply and an optional host

computer running the VibroSight software.

A measurement block is a logical grouping of

VibroSmart modules that allows data such as

tachometer, trigger and alarm information to be

shared, for example, in order to monitor the same

machine. Measurement blocks are configured

using the VibroSight software.

Note: A VibroSmart system is limited to a

maximum of two VSI010 modules per

measurement block.

A VibroSmart module consists of an electronics

module (providing configurable machinery

monitoring functions) that clips into a VibroSmart

terminal base, which mounts on a DIN rail. A

range of plug-in fieldbus communications

adaptors that interface directly with the VSI010

module are available to provide an integrated

solution for interfacing to fieldbuses.

VibroSmart terminal bases incorporate buses and

connectors to provide all of the I/O connections

required to interface to a VibroSmart module.

Terminal bases also include non-volatile memory

to store the configuration of the attached

VibroSmart module, which allows modules to be

hot-swapped. Modules and terminal bases use

mechanical key-coding for a system that is simple

to operate and use.

Different VibroSmart modules, terminal bases and

fieldbus communications adaptors can be

combined to offer unique combinations of

functionality, versatility and safety assurance. In

this way, a monitoring system can be built to meet

the exact needs of an application resulting in a

more cost-effective and reliable solution.

Introduction

The VibroSmart ® distributed monitoring system

(DMS) is a system of modular and scalable

products designed for condition monitoring and

machinery protection applications for power

generation turbines, oil and gas applications and

auxiliary balance-of-plant equipment.

VibroSmart ® modules can be mounted directly

on machinery, reducing the need for expensive

cabling, because they are designed and certified

to work in extremes, such as harsh industrial

environments characterised by potentially

explosive atmospheres (Ex Zone 2), high

temperatures (70 °C, 158 °F) and high mechanical

stress. VibroSmart complements the VM600 series

of rack-based solutions from Meggitt’s

vibro-meter ® product line and is compatible with

the same VibroSight ® machinery monitoring

system software.

The VibroSmart ® VSI010 communications

interface module is an optional communications

module for use with other VibroSmart modules in a

monitoring system. The VSI010 module supports up

to two fieldbus channels and allows the data from

the VibroSmart modules in a measurement block

to be read by fieldbus master devices.