Emerson SR5 Manual de Instruções descarregar pdf (Página 4)

Type SR5



Clean out all pipelines before installation of the

regulator and check to be sure the regulator has not

been damaged or collected foreign material during

shipping. The regulator may be installed in any

position desired. However, to ensure self-draining

(from outlet to inlet) the regulator should be installed

with the spring case in the upright vertical position.

The arrow on the body indicates ow direction.

The piping ange to regulator end connection

ange clamps and gaskets are supplied by the

user. Clamp gaskets must be compatible with the

system requirements. Install and tighten clamps to

manufacture’s specications.











The spring case can be pressure loaded to adjust

outlet pressure. An optional tapped spring case,

guide ring seal and sealing washer on the adjusting

screw must be used for these applications. The

loading pressure is connected to the 1/4 NPT

connection in the spring case allowing registration

on the spring side of the diaphragm. Adjusting

loading pressure will proportionally change the outlet

pressure setting of the regulator. A small amount of

mechanical spring load, in addition to the pressure

load, is recommended. Regulator set pressure

achieved from the combination of spring load and

pressure load should not exceed the outlet pressure

ranges listed in Table 2.



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 downstream equipment.



The regulator is factory set to the midpoint of the

spring range. To change the setpoint, refer to the

Adjustment section for directions. 



 See the section on Clean in Place

or Steam in Place (CIP/SIP). With proper installation

completed and relief valves properly adjusted

(when applicable), slowly open the upstream and

downstream shutoff valves.

























The setting of the regulator can be varied within the

pressure range stamped on the nameplate. It is

important to have a nominal amount of downstream

demand while adjusting the setpoint. Typically 5 to

10% of maximum capacity is adequate. To change the

outlet pressure, loosen the locknut (key 17, Figure 4) or

locking lever (key 22, Figure 4) and turn the adjusting

screw (key 18, Figure 4) clockwise to increase outlet

pressure, or counterclockwise to decrease it. Monitor

the outlet pressure with a test gauge during the

adjustment. Tighten the locknut or locking lever to

maintain the desired setting. All regulator springs can

be backed off to provide zero outlet. Available spring

ranges, recommended maximum allowable differential

pressures and spring data are shown in Tables 2 and 3.



Close the upstream shutoff valve. Close downstream

shutoff valve. Open the bleed valve between the

regulator and the downstream shutoff valve. Without

changing regulator spring adjustment, all pressure

between the upstream and downstream shutoff valves

is released through the bleed valve, since the regulator

opens in response to the decreased outlet pressure.











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