Installation; Startup And Adjustment - Emerson Fisher Y692 Instruction Manual

Type Y692

installation

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Personal injury, equipment damage or
leakage due to escaping accumulated
gas or bursting of pressure-containing
parts may result if the gas blanketing
regulator is overpressured or installed
where service conditions could exceed
the limits given in Specifications
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
(as required by Title 49, Part 192, of the
u.S. code of Federal Regulations, by
the national Fuel Gas code Title 54 of
the national Fire codes of the national
Fire Protection association or by other
applicable codes) to prevent service
conditions from exceeding those limits.
additionally, physical damage to the
gas blanketing regulator could result in
personal injury and property damage
due to escaping accumulated gas. To
avoid such injury and damage, install
the gas blanketing regulator in a safe
and well ventilated location.
1. Use qualified 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
external pipe threads.
2. To achieve the published capacities, install the
regulator as close as possible to the blanketed
vessel using a straight run of pipe the same size
or larger as the regulator body. Flow through the
regulator body is indicated by the flow arrow cast
on the body. If a block valve is required, install a full
flow valve between the regulator and the blanketed
vessel. For proper operation, the regulator
must be installed with the spring case barrel
pointed down (as shown in Figures 2 and 3). Key
numbers referenced in this section are shown in
Figure 6.
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if the regulator vents some gas or a leak
develops in the system, it indicates that
service is required. Failure to take the
regulator out of service immediately
may create a hazardous condition. in
hazardous or flammable gas service,
vented gas may accumulate and cause
personal injury, death or property damage
due to fire 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.
4. To remotely vent the regulator, remove the vent
(key 56) and install obstruction-free tubing or piping
into the 1/4 NPT vent tapping. Provide protection
on a remote vent by installing a screened vent cap
into the remote end of the vent pipe.
5. If continuous operation of the system is required
during inspection or maintenance, install a parallel
run with a three-valve bypass around the regulator.
For Types with external pressure registration which
require a downstream control line, be sure to install the
control line before putting the regulator into operation.
The control line pipe should be at least 1/2 in. / 13 mm
in diameter and connected to a straight section of
outlet piping 5 to 10 pipe diameters downstream of
the regulator. If turbulence exists, a hand valve can
be installed in a straight section of the control line.
This hand valve can be throttled down to dampen out
pulsations which may cause instability or cycling of the
regulator. If a block valve is required, install a full flow
valve between the regulator and the blanketed vessel.

Startup and adjustment

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To avoid personal injury, property
damage or equipment damage caused
by bursting of pressure containing parts
or explosion of accumulated gas, never
adjust the control spring to produce a
control pressure higher than the upper
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