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Y690A Series

D102587X012

Instruction Manual

Form 5463

February 2009

www.emersonprocess.com/regulators

Y690A Series Pressure Reducing Regulators

WARNING

Fisher

regulators must be installed,

operated, and maintained in accordance

with federal, state, and local codes, rules

and regulations, and Fisher instructions.

If the regulator vents gas or a leak

develops in the system, service to the unit

may be required. Failure to correct trouble

could result in a hazardous condition.

Call a gas service person to service

the unit. Only a qualied person must

install or service the regulator.

Introduction

Scope of Manual

This Instruction Manual provides instruction for

installation, startup, maintenance, and parts list for

the Y690A Series pressure reducing regulators.

Instructions and parts lists for other equipment used

with these regulators are found in separate manuals.

Description

The Y690A Series self-contained, spring-loaded

regulators (Figure 1) provide economical pressure

reducing control in a variety of commercial and

industrial applications. The Y690A Series pressure

reducing regulator (Figure 1) is ideally suited to

control gas supply to in-plant processing equipment.

The rugged casings and sliding pusher post design

withstands the full 150 psig (10,3 bar) inlet pressure

at both the inlet and outlet connections. Because

these regulators can withstand the full inlet pressure,

a downstream relief valve is not required to protect

the downstream side of the regulator unless full

capacity relief is required. Available type numbers are

described in the Specications section.

Specications

The Specications section on page 2 provides the

ratings and other specications for the Y690A Series.

The following information is stamped on the regulator

at the factory: type number, date of manufacture,

spring range, orice size, maximum inlet pressure,

maximum operating outlet pressure, and outlet

pressure which may damage regulator parts.

W7293

Figure 1. Types Y690A and Y690AH Direct-Operated Pressure

Reducing Regulators

1 2 3 4 5 6 ... 11 12

Y690A Series 1

Inhaltsverzeichnis

Seite 1 - Y690A Series

Y690A SeriesD102587X012Instruction ManualForm 5463February 2009www.emersonprocess.com/regulatorsY690A Series Pressure Reducing Regulators!WARNINGFishe

Seite 2

Y690A Series1047B5834Figure 6. Type Y690AM or Y690AHM Regulator Assembly

Seite 3

Y690A Series1147B5834Figure 7. Y690A Series Regulator Outer Assembly322426Key Description Part Number 24 Diaphragm Case Cap Screw (8 required)

Seite 4

Y690A SeriesThe Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fis

Seite 5

Y690A Series2SpecicationsAvailable Congurations Type Y690A—Low-pressure, 1 to 7-inches w.c. (2 to 17 mbar), direct-operated regulator

Seite 6

Y690A Series3Principle of OperationRefer to Figure 2. When downstream demand decreases, the pressure under the diaphragm increases. This pressure ov

Seite 7

Y690A Series4Installation!WARNINGPersonal injury, property damage, equipment damage, or leakage due to escaping gas or bursting of pressure-containing

Seite 8

Y690A Series5away from air intakes or any hazardous area. The vent line or stack opening must be protected against condensation or clogging. 3. To

Seite 9

Y690A Series6in Figures 5, 6, and 7. 1. Remove the cap screws (key 2, Figure 7) and separate the diaphragm casing (key 4) from the

Seite 10

Y690A Series7 stem (key 14) or access the stem seal O-ring (key 30, Types Y690AM and Y690AHM only), perform Body Area Maintenance

Seite 11

Y690A Series8Key Description Part Number 10* Diaphragm Nitrile (NBR) 37B9720X012 Fluorocarbon (FKM) 23B0101X052 Nitrile (NBR) with P

Seite 12

Y690A Series947B5832Figure 5. Type Y690A or Y690AH Regulator Assembly3