Table of Contents
Instruction Manual
Form 5862
October 2015
Prx Series Pilots for Pilot-Operated Pressure
Reducing Regulators
W8346
Introduction
Scope of the Manual
This manual provides installation, startup, maintenance and
Parts Ordering information for the PRX Series pilots and
Type Sa/2 filter used together with Pilot-Operated Pressure
Reducing Regulators for high pressure applications.
For information on mounting on Pilot-operated Regulators,
monitoring systems and installations, refer to full
product literature:
Type EZH: D103077X012
Type EZR: D102600X012
Type FL: D103068X012
Product Description
The PRX Series pilots are mainly used in natural gas, air or
other non-corrosive gas applications. They have a double
diaphragm which provides increased accuracy and sensitivity,
W8348
TYPE PRX-120
Figure 1. PRX Series Pressure Reducing Pilots
www.tartarini-naturalgas.com
P1666
TYPE PRX-120/AP
an integral damper screw to adjust opening and closing
speeds and a restrictor screw to adjust pilot gain.
The PRX Series pilots can be also be used in other
applications such as relief valve or backpressure regulators
and as a quick dump pilot.
Furthermore, PRX Series pilots have the ability to handle
a wide range of setpoints, from 14.5 to 1160 psig / 1.00 to
80.0 bar.
Type SA/2 Pilot Supply Filter Regulator
The PRX Series pilots are usually used together with the
Type SA/2 pilot supply filter regulator. The Type SA/2
provides a constant supply pressure to the PRX Series pilot
that is approximately 45 psi / 3.1 bar over set pressure. The
Type SA/2 has an integral 5 micron filter.
PRX Series
TYPE PRX-182
Table of Contents
Related Manuals for Emerson Tartarini PRX Series
Summary of Contents for Emerson Tartarini PRX Series
- Page 1 PRX Series Instruction Manual Form 5862 October 2015 PRX Series Pilots for Pilot-Operated Pressure Reducing Regulators W8346 W8348 P1666 TYPE PRX-120 TYPE PRX-120/AP TYPE PRX-182 Figure 1. PRX Series Pressure Reducing Pilots Introduction Scope of the Manual This manual provides installation, startup, maintenance and an integral damper screw to adjust opening and closing parts ordering information for the PRX Series pilots and speeds and a restrictor screw to adjust pilot gain.
- Page 2 PRX Series Specifications The Specifications section lists pressure limitations and other specifications for all models of PRX Series pilots. Please note that the pilot control spring range is displayed on the pilot nameplate. Maximum Inlet Pressures Threaded Connections See Table 2 1/4 NPT Outlet (Control) Pressure Ranges Orifice Size...
- Page 3 PRX Series Available Configurations When the gas demand in the downstream system has been satisfied, the outlet pressure increases. The increased Type PRX/120: Outlet pressure range of 14.5 to 435 psig / pressure is transmitted through the downstream control line 1.00 to 30.0 bar.
- Page 4 PRX Series relieving or pressure-limiting devices to prevent 4. Connect a downstream bleed line from the “S” port on service conditions from exceeding those limits. the PRX Series pilot to a straight run of pipe 6 to 10 pipe Also, be sure the installation is in compliance diameters from the regulator outlet, using 3/8 in.
- Page 5 The Restrictor and Damper screws on the PRX Series pilot regulations. Due to the care Emerson™ takes in meeting control the regulator’s proportional band (droop) and speed all manufacturing requirements (heat treating, dimensional of response.
- Page 6 PRX Series 3. Use a wrench to hold the stem (key 23) and break loose 11. Place the lower spring seat (key 9) on the upper the stem nut (key 20). Remove the stem nut and washer diaphragm nut (key 26) and mount the upper cover (key 11).
- Page 7 PRX Series Lower Diaphragm Maintenance 7. Set the disk holder (key 22) in the body (key 16). 8. Lightly lubricate the rims of the diaphragm (key 14). 1. Disconnect pilot and remove it from the line. Position the diaphragm convolution facing down, make 2.
- Page 8 PRX Series Table 4. Type PRX/120 Connections CODE UNLOADING OR BOOT STYLE TWO-PATH OR LOADING STYLE Downstream Sense Line Downstream Sense Line Outlet discharge Pilot feed Pilot feed Outlet discharge To regulator loading pressure chamber To regulator loading pressure chamber 9.
- Page 9 PRX Series AP VERSION TYPES PRX/120 AND PRX/125 PILOT ASSEMBLY TYPE PRX/125 VERSION - SECTION A-A TYPE PRX/120 VERSION - SECTION A-A APPLY LUBRICANT L1 = LITHIUM POLYMER TYPE LUBRICANT (MULTI-PURPOSE GREASE) L2 = ANTI-SEIZE LUBRICANT 1. Lubricants must be selected such that they meet the temperature requirements. Figure 2.
- Page 10 PRX Series TYPE PRX/131 ASSEMBLY TYPE PRX/182 PILOT ASSEMBLY SECTION A-A SECTION A - A Figure 3. Type PRX/131 Pilot Assembly Figure 4. Type PRX/182 Pilot Assembly...
- Page 11 PRX Series 19 20 21 19 20 21 SECTION A-A LM/1162 H - WATER INLET/OUTLET M - UPSTREAM OF THE REGULATOR R - TO THE FEEDING OF THE PILOT V - DOWNSTREAM OF THE REGULATOR Figure 5. Type SA/2 Assembly...
- Page 12 For further information visit www.emersonprocess.com/regulators The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Tartarini is a mark owned by O.M.T. Officina Meccanica Tartarini s.r.l., a business of Emerson Process Management.