Emerson YARWAY User Manual

YARWAY COLOR-PORT® WATER LEVEL GAUGES

Bi-color, direct reading, ported style water level gauge for low, medium and high pressure boilers

FEATURES

• Combination of design and durable materials assures long service life.

• Individual port assemblies can be replaced in minutes with the gauge in place.

• Spring loading maintains proper pressure on glasses and gaskets at all times.

• Contrasting red and green readings show water level through high visibility illuminator display view slots.

• Choice of direct or mirror viewing systems.

• Choice of low, medium or high pressure designs for use with stuffing box gaugecocks or Welbloc L200V valves.

• Glasses accurately molded and tempered to high specifications.

•

Glass, mica and gasket assembly is registered precisely in the body’s gasket groove.

• High quality mica protects the inner surface of each glass from the erosive action of steam, water and alkalis.

• Specially-molded flexible graphite gasket between mica and gauge body ensures a tight seal.

• PED 97/23/EC conformance available.

GENERAL APPLICATION

TECHNICAL DATA

Color-Port gauges provide continuous indication of boiler water levels as required by the ASME Boiler and Pressure Code PG-60.

Sizes: ½” to ¾” (15 to 19 mm) Max. pressure Low pressure design: 850 psi (59 bar) Medium pressure design: 1800 psi (124 bar) High pressure design: 3000 psi (207 bar) Number of ports: 5 to 26

Visibility: 12

" to 72

”

(310 to 1843 mm)

Emerson.com/FinalControl VCTDS-00413-EN 20/06

YARWAY COLOR-PORT® WATER LEVEL GAUGES

Individual circular glasses; inner

faces protected by mica.

Each cover held solidly against body by

four 12-point capscrews. Each cover

and its glass may be tightened or

removed without disturbing opposite

set. Spring cones provide proper

Glasses

Cover bolting

sealing force.

Ports

Large diameter port openings for increased visibility

PG-60.1 WATER LEVEL INDICATORS

Color-Port gauges provide continuous indication of boiler water levels as required by the ASME* Boiler and Pressure Code. Under PG-60, the Code states:

PG-60.1: all boilers having a fixed water level (steam and water interface) shall have at least one

gauge glass (a transparent device that permits visual determination of the water level).

PG-60.1.1: boilers having a maximum allowable working pressure exceeding 400 psi (2800 kPa) shall have two gauge glasses. Instead of one of the two required gauge glasses, two independent remote water level indicators (two discrete systems that continuously measure, transmit, and display water level) may be provided. Boilers not having a fixed water level, such as forced-flow steam generators and high-temperature water boilers of the forced circulation type, are not required to have a gauge glass. Electrode type electric boilers are required to have only one gauge glass, regardless of MAWP.

PG-60.1.1.1: when the water level in at least one gauge glass is not readily visible to the operator in the area where control actions are initiated, either a fiber optic cable (with no electrical modification of the optical signal) or mirrors shall be provided to transfer the optical image of the water level to the control area. Alternatively, any combination of two of the following shall be provided: (a) an independent remote water level indicator; (b) an independent continuous transmission and display of an image of the water level in a gauge glass.

* The American Society of Mechanical Engineers, Boiler and Pressure Vessel Committee, establishes rules of

safety governing the design, fabrication and inspection of boilers and unfired pressure vessels.

YARWAY COLOR-PORT® WATER LEVEL GAUGES

Water (or Steam) space

Vents

Sealing surface

A complete Color-Port system includes the gauge, a water column or tie bar, two gauge valves and an illuminator/display.

Illuminators

Illuminators are designed to be mounted readily to the color-port gauge chamber and comprise three main components: level display, illuminator and power supply. An LED lighting source is standard.

All illuminators are complete with a color screen containing two strips of glass - one red and one green. Due to the difference in the index of refraction of light through water and steam, only the corresponding color is seen: green for water, red for steam.

Item No. Part Name

1 Gauge Body 2 Cover 3 Glass* 4 Spring Cone(s) 5 Washer 6 Cushion Gasket* 7 Clip Ring* 8 Retaining Spring 9 Mica* 10 Cap Screws 11 Sealing Gasket*

*Furnished in kit - P/N 7Y584-000 Groove clean up tool - (stainless wire brush) P/N 301160

Illuminator

Color port gauge

Power supply

Level display

SHOWING STEAM PRESENT

Illuminator (ILCP)

SHOWING WATER PRESENT

Gauge

LED PORTED GAUGE ILLUMINATOR AND

Light beam (steam indication)

Level display (ILCPd)

Light beam (water indication)

LEVEL DISPLAY

View slot

Illuminator (ILCP) Gauge

Level display (ILCPd)

YARWAY COLOR-PORT® WATER LEVEL GAUGES

TYPICAL VIEWING SYSTEMS

Illuminator

Level display

Features and benefits

• Meets ASME Boiler Code requirements for direct gauge viewing.

• Up to 100,000 hours service.

• Designed to be assembled and disassembled from the gauge easily.

• Power supply housed in an aluminum explosion-proof housing with ¾" NPTF electrical connection.

• Input voltage 115 or 230 VAC at 50-60 Hz.

• Power consumption up to 400 mA max at 115 / 230 V AC.

• Power supply can be mounted integrally or remote mounted up to 200 feet from illuminator. Consult factory for longer distance requirements.

Display hoodLevel displayIlluminator

Level displayIlluminator

Hooded mirror

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