Labelling; Dimensions And Weights; Installation; Startup - Emerson Tartarini PRX Series Manual

PRX Series

LABELLING

BOLOGNA ITALY
O.M.T.
MATRICOLA
SERIAL Nr.
ANNO
Note 2
YEAR
NORME ARMONIZ.
EN
HARMONIZED STD.
CLASSE DI PERDITA
LEAKAGE CLASS
CLASSE FUNZIONALE
Cg
FUNCTIONAL CLASS
FLUIDO GRUPPO
1
pmax
FLUID GROUP
PS
Note 3 Note 4
TS °C
body
Figure 2. Label for PRX Series Pilots
Note 1: See "Characteristics"
Note 2: Year of Manufacture
Note 3: Class 1: -10° to 60°C
Class 2: -20° to 60°C
Note 4: See "Characteristics"

DIMENSIONS AND WEIGHTS

A
Figure 3. PRX Series Pilots Dimensions (mm)
Table 2. Dimensions (mm) and Weights (kg)
CODE PRX FULL RANGE
A 65
B 215
Weight 3.2
2
APPARECCHIO TIPO / DEVICE TYPE
Note 1
DN1
DN2
Wa
Wao
Wau
bar pao
PS
- 1.5
bar bar PT=
covers
A
PRX-AP FULL RANGE
65
257
3.5

INSTALLATION

a. Make sure that specifications on the pilot plate comply
with the intended use.
b. Make sure that all connections are correctly made.
bar

STARTUP

bar
bar
bar
Refer to the regulator or slam-shut valve startup instructions.
x PS bar

ADJUSTMENT

Only for PRX/120, PRX/125, PRX-AP/120
and PRX-AP/125 Pilots:
Adjusting response stability and rapidity is achieved by
means of the appropriate adjusting screws, R (restrictor) and
D (damper).
The register D is normally completely unscrewed; by
screwing the register, the response of the regulator can be
slowed down.
The register R is normally completely screwed; in case of
hunting of the set pressure, we suggest unscrewing slowly
the register until pressure steadiness is reached.
By unscrewing the register, the set pressure decreases;
intervene on register screw (key 1) in order to re-establish
the correct pressure.
If register R is completely unscrewed, the
regulator can not deliver the maximum
requested capacity.
In order to better assess the effects of
adjustments, it is advisable to turn the
adjusting screws only one fourth of a turn
at a time and to verify the new conditions
before carrying out the further rotation.
PERIODICAL CHECKS
Only for PRX/120, PRX/125, PRX-AP/120
and PRX-AP/125 Pilots:
Gas-tightness Test
When starting up the regulator, and at regular intervals,
check gas tightness as follows:
a. Slowly close downstream cut-off valve.
b. In order to avoid excessive lock-up pressures, close the
CAUTION