Emerson Y696 Instruction Manual

Instruction Manual
Form 5312

January 2009

Type Y696 Vapor Recovery Regulator

Type Y696

W5996

Figure 1. Type Y696 Vapor Recovery Regulator

Introduction

Scope of Manual

This instruction manual includes installation, startup,
maintenance, and parts information for the Type Y696
vapor recovery regulator.

Product Description

The Type Y696 vapor recovery regulator is a direct­operated regulator with internal registration requiring
no downstream control line. It is used to sense
increase in vessel pressure and vent excessive
internal vessel pressure to an appropriate vapor
recovery disposal or reclamations system.

Specications

The Specications section lists maximum pressures,
temperatures, and other specications. Specications

for a given regulator as it originally comes from the
factory are stamped on the spring case nameplate.

Principle of Operation

The Type Y696 is used to maintain a constant inlet

(blanket) pressure with the outlet owing to a system

whose pressure is lower than that at the inlet.

When vessel pressure increases above the setpoint
of the regulator due to pumping in or thermal heating,
the force of the control spring is overcome by

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D101770X012

Type Y696

Specications

Body Size and End Connection Style

See Table 1

Maximum Allowable Inlet and Outlet Pressure

15 psig (1,0 bar)

Control Pressure Ranges

See Table 2

1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded.

(1)

Pressure Registration

Internal

(2)

Spring Case and Vent Connections

1/4-inch NPT

Maximum Temperature Capabilities

Nitrile (NBR): -20° to 180°F (-29° to 82°C)
Fluorocarbon (FKM): 0° to 300°F (-18° to 149°C)

(2)

INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE

M1058

Figure 2. Type Y696 Vapor Recovery Operational Schematic

VAPOR PRESSURE

LIQUID

VAPOR RECOVERY

VACUUM SOURCE

2

Table 1. Body Sizes and End Connection Styles

Type Y696

BODY SIZE,

INCHES (DN)

1-1/2 and 2 (40 and 50) NPT

CONTROL PRESSURE RANGE SPRING PART NUMBER SPRING COLOR WIRE DIAMETER

2 to 5-inches w.c.

5 to 15-inches w.c.

0.3 to 1 psig

1 to 2.8 psig
2 to 3.5 psig

4 to 7 psig

1. Spring ranges based on spring case installed pointed down. When installed pointed up, spring range increases 2-inches w.c. (5 mbar).

2. Do not use Fluorocarbon (FKM) diaphragm with these springs at diaphragm temperatures lower than 60°F (16°C).

(5 to 12 mbar)
(12 to 37 mbar)
(0,02 to 0,07 bar)

(0,07 to 0,19 bar)
(0,14 to 0,24 bar)
(0,28 to 0,48 bar)

Cast Iron Steel Stainless Steel Hastelloy® C

NPT, SWE, CL150 RF,

CL300, PN 16/25/40

Table 2. Control Pressure Ranges

(1)(2)

(1)(2)

1A200127022
1B577727062
0B019427052

0A081127202
0Y066427022
1H8024000A2

pressure acting on the diaphragm. This moves the

disk away from the orice allowing gas to ow from

the vessel to the vapor recovery system.

As vessel pressure is reduced, the force of the
control spring causes the disk to move toward the

orice decreasing the ow of gas out of the vessel.

As vessel pressure drops below the setpoint of the

regulator, the disk will seat against the orice shutting
off the ow of gas.

BODY MATERIAL

NPT, SWE, CL150 RF,

CL300, PN 16/25/40

Red

Gray

Green

Orange

Green stripe

Silver

1. Use qualied personnel when installing, operating,

and maintaining the regulator. Before installing,
inspect the regulator for any shipment damage or
foreign material that may have collected during
crating and shipment. Make certain the body
interior is clean and the pipelines are free of
foreign material. Apply pipe compound only to the
male pipe threads.

2. Install the regulator using a straight run of pipe the
same size or larger as the regulator body (as
shown in Figure 2). Flow through the regulator

Installation

body is indicated by the ow arrow cast on the

body. If a block valve is required, install a full

WARNING

!

ow valve between the regulator and the

blanketed vessel. For proper operation, the
regulator should be installed with the spring case

Personal injury, equipment damage, or
leakage due to escaping accumulated gas

barrel pointed down. Key numbers referenced in
this section are shown in Figure 3.

or bursting of pressure-containing parts
may result if the vapor recovery regulator

!

is overpressured or installed where
service conditions could exceed the limits

given in the Specications section, or

where conditions exceed any ratings of
the adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices to prevent service conditions from
exceeding those limits.

Additionally, physical damage to the
vapor recovery regulator could result
in personal injury and property damage
due to escaping accumulated gas. To
avoid such injury and damage, install
the vapor recovery regulator in a safe
and well ventilated location.

A regulator may vent some gas to
the atmosphere. In hazardous or

ammable gas service, vented gas may

accumulate, and cause personal injury,

death, or property damage due to re or

explosion. Vent a regulator in hazardous
gas service to a remote, safe location
away from air intakes or any hazardous
location. The vent line or stack opening
must be protected against condensation
or clogging.

3. To keep the spring case vent from being plugged
or the spring case from collecting moisture,
corrosive chemicals, or other foreign material,
point the vent down or otherwise protect it.

CL150 RF

0.135-inches (3,43 mm)

0.156-inches (3,96 mm)

0.187-inches (4,75 mm)

0.250-inches (6,35 mm)

0.363-inches (9,22 mm)

0.406-inches (10,3 mm)

WARNING

3