Emerson Y693 Datový list stáhnout pdf (Strana 5)

Controlspring,springseatandsplitring Plated steel Plated steel

Diaphragm plate Aluminum and Steel Aluminum and Steel

Disk and O-rings

Nitrile (NBR) and Stainless steel, Fluorocarbon (FKM)

andStainlesssteel,PTFEandStainlesssteel

Nitrile (NBR) and Stainless steel or Fluorocarbon (FKM)

andStainlesssteelorPTFEandStainlesssteel

4. From Table 6, at 0.5 in. w.c. / 1 mbar set pressure

and40psiginletpressure,aTypeY693willow

8880SCFH/238Nm

/hnitrogen.Thissatisesthe

5729SCFH/154Nm

/h requirements.

Capacity Information

Table 6 gives typical nitrogen regulating capacities at

selected inlet pressures and outlet pressure settings.

Flows are in SCFH (60°F and 14.7 psia) of 0.97

specicgravitynitrogen.Forgasesofotherspecic

gravities, multiply the given capacity of nitrogen by

0.985, and divide by the square root of the appropriate

specicgravityofthegasrequired.Then,ifcapacityis

desiredinnormalcubicmetersperhoursat0°Cand

1.01325 bar, multiplySCFHby 0.0268.

Todeterminewide-openowcapacitiesforrelief

sizing,usethefollowingformula:

Q =

520

3417

SIN DEG

where,

= gassizingcoefcientfromSpecicationstable

= C

/C

or33fromtheSpecicationstable

G = gasspecicgravity(air=1.0)

1abs

= inlet pressure, psia (add 14.7 psi to gauge inlet

pressure to obtain absolute inlet pressure)

Q = owrate,SCFH

T = absolute temperature in °R of gas at inlet (°F + 460)

Installation

The regulator may be installed in any position as

longastheowthroughthebodyisinthedirection

indicatedbytheowarrowattachedtothebody.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. Position the body and/or

diaphragm spring case so it will not collect moisture or

debris into the screened vent and also be self draining

(as shown in Figure 3). If a block valve is required,

installafullowvalvebetweentheregulatorandthe

blanketed vessel.

Attach a downstream pressure control line to the

female connection in the lower spring case. The

female pressure connection is a 1/2 NPT in the steel

or Stainless steel lower spring case and a 3/4 NPT

forthealuminumlowerspringcase.Connectthe

other end of the control line to the vessel. To allow for

self-drainage, install the control line at an angle so that

any liquid material will drain away from the regulator.

See Figure 4 for the location of the external control line

connection.Externaldimensionsandconnectionsare

shown in Figure 4.

1 2 3 4 5 6 7 8 9 10 11 12

Bulletin 74.1:Y693 1

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