Emerson Y693 Installation Guide

Installation Guide
English – May 2002

Type Y693

Introduction

This installation guide provides instructions for installation,
startup, and adjustment. To receive a copy of the instruction
manual, contact your local Fisher Sales
Office or Sales Representative or view a copy at
www.FISHERregulators.com. For further information refer to:

Type Y693 Instruction Manual, form 5342, D102021X012.

P.E.D. Categories

This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive 97/23/EC categories. It may also be used out­side of the Pressure Equipment Directive using sound
engineering practice (SEP) per table below.

EZISTCUDORPSEIROGETACEPYTDIULF

)hcni-2dna2/1-1(05dna04NDI1

Specifications

Maximum Inlet and Outlet Pressures

10,4 bar (150 psig) and 1,0 bar (15 psig)

Proof Test Pressure

All Pressure Retaining Components have been
proof tested per Directive 97/23/EC - Annex 1,
Section 7.4

Outlet Pressure Ranges

Light Diaphragm Plate: 1,2 to 6,7 mbar (0.5 to 2.0

inches w.c.), 6,7 to 12 mbar (2 to 5 inches w.c.), 12 to
19 mbar (5 to 8 inches w.c.), 19 to 44 mbar (8 to 18
inches w.c.), and 44 to 78 mbar (18 to 32 inches w.c.)
Heavy Diaphragm Plate: 0,07 to 0,17
bar (1 to 2 psig), 0,10 to 0,23 bar (1.5 to 3.3 psig), and
0,14 to 0,34 bar (2 to 5 psig)

Heavy Diaphragm Plate with brass closing cap and
heavy duty spring adjustor: 0,14 to 0,37 bar (2 to 5.5

psig) and 0,27 to 0,69 bar (4 to 10 psig)

(1)

Maximum Operating Outlet Pressure to Avoid
Internal Part Damage

0,14 bar (2 psig) above outlet pressure setting

Temperature Capabilities

Nitrile (NBR):
Fluoroelastomer:
Elastomeric (PTFE):

-29 to 82°C (-20 to 180°F)

(1)

(1)

+5 to 149°C (+40 to 300°F)

-18 to 149°C (0 to 300°F)

(1)

Installation

Only qualified personnel should install or service
a regulator. Regulators should be installed,
operated, and maintained in accordance with
international and applicable codes and
regulations, and Fisher instructions.

If the regulator vents fluid or a leak develops in
the system, it indicates that service is required.

1. The pressure/temperature limits in this installation guide and any applicable
standard or code limitation should not be exceeded.

Failure to take the regulator out of service
immediately may create a hazardous condition.

Personal injury, equipment damage, or leakage due
to escaping fluid or bursting of pressure-containing
parts may result if this regulator is overpressured
or is installed where service conditions could
exceed the limits given in the Specifications section,
or where conditions exceed any ratings of the
adjacent piping or piping connections.

To avoid such injury or damage, provide pressure­relieving or pressure-limiting devices (as required
by the appropriate code, regulation, or standard) to
prevent service conditions from exceeding limits.

Additionally, physical damage to the regulator could
result in personal injury and property damage due
to escaping fluid. To avoid such injury and damage,
install the regulator in a safe location.

Clean out all pipelines before installation of the regulator
and check to be sure the regulator has not been damaged
or has collected foreign material during shipping. For NPT
bodies, apply pipe compound to the male pipe threads. For
flanged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired, unless otherwise specified, but be sure
flow through the body is in the direction indicated by the
arrow on the body.

Note

It is important that the regulator be installed so that
the vent hole in the spring case is unobstructed at all
times. For outdoor installations, the regulator should
be located away from vehicular traffic and positioned
so that water, ice, and other foreign materials cannot
enter the spring case through the vent. Avoid placing
the regulator beneath eaves or downspouts, and be
sure it is above the probable snow level.

Overpressure Protection

The recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.

Regulator operation below the maximum pressure limitations
does not preclude the possibility of damage from external
sources or debris in the line. The regulator should be inspected
for damage after any overpressure condition.

Startup

The regulator is factory set at approximately the midpoint of
the spring range or the pressure requested, so an initial
adjustment may be required to give the desired results. With
proper installation completed and relief valves properly adjusted,
slowly open the upstream and downstream shutoff valves.

D102021XENG

www.FISHERregulators.com

Type Y693

Adjustment

To change the outlet pressure, remove the closing cap or
loosen the locknut and turn the adjusting screw clockwise
to increase outlet pressure or counterclockwise to decrease
pressure. Monitor the outlet pressure with a test gauge
during the adjustment. Replace the closing cap or tighten
the locknut to maintain the desired setting.

Taking Out of Service (Shutdown)

To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.

Parts List

Key Description

1 Control Spring
2 Adjusting Screw
3 Closing Cap
4 Lower Control Spring Seat
5* Diaphragm Assembly
6 Lower Diaphragm Plate
7* Diaphragm Plate Gasket
8 Pusher Post
9 Lever Assembly
11 Machine Screw
12 Machine Screw
13 Stem
15* Stem O-ring
16 * Body Gasket
17 Snap Ring
19 Union Nut
20 Lower Casing Assembly
21 Diaphragm Case Cap Screw
22 Hex Nut
23 Spring Case
25 * Disk Holder
27 Orifice
28 Body
30 Cap Screw
35 * Closing Cap Gasket
44 Spring Seat
50 Nameplate
51 Drive Screw
56 Vent Assembly
64 Bushing O-Ring
66 PTFE Wiper
69 PTFE Back-up ring
72 Reducing Nipple, plastic
74 Bushing Snap Ring
75 Elbow
85 Bias Spring
93 Hex Nut
97 Body Bushing
98 Disk Washer
9 9 Disk

34B4832-B

2

34B4867-A

34B4869-A

Figure 1. Type Y693 Adjusting Screw / Control Spring Combinations