Type R522
Fisher Controls
Installation Manual
Type R522 and R522H Pressure Reducing Regulators
October 1992
Introduction
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.
This installation manual covers the installation, startup, and adjustment procedures for Type R522 and R522H pressure reducing regulators. The Type R522 self-operated, spring-loaded regulator provides economical pressure-reducing control in a variety of service and industrial applications. The regulator can be used with a variety of gaseous fluids such as natural gas, manufactured gas, propane, or air. The Type R522 regulators have high capacity and factory adjustable internal relief to help minimize overpressurization of the downstream system. Any excess outlet pressure above the start-to-discharge point of the relief valve spring, moves the diaphragm off the relief valve seat, allowing excess pressure to bleed out through the screened spring case vent.
Installation WARNING Personal injury, equipment damage, or leakage due to escaping accumulated gas or bursting of pressure-containing parts may result if this regulator is overpressured or is installed where service conditions could exceed the limits given in table 1. To
Form 5331
Additionally, physical damage to the regulator could result in personal injury or property damage due to escaping gas. To avoid such injury and damage, install the regulator in a safe location. 1. Only personnel qualified through training and experience should install, operate, and maintain a regulator. Before installing a Type R522 regulator, check for damage which might have occurred in shipment. Also check for dirt or foreign matter which may have accumulated in the regulator body or in the pipeline. 2. The Type R522 may be installed in any position (vertical or horizontal). Apply a good grade of pipe compound to the male threads (being sure not to apply pipe compound to flow path of the pipe) of the pipe and install the regulator so that the flow is in the direction of the arrow cast on the body. Use approved piping procedures when installing the regulator.
Table 1. Specifications
Body Sizes And End Connection Style Inlet: ■ 1/4, ■ 1/2, and ■ 3/4-inch NPT screwed Outlet: ■ 1/2 and ■ 3/4-inch NPT screwed Maximum Allowable Inlet Pressure (1) 250 psig (17 bar)
Allowable Outlet Pressures(1) Emergency (Casing): 20 psig (1.4 bar) Maximum Operating to Avoid Internal Part Damage: 3 psi (0.21 bar differential) above outlet pressure setting
Outlet Pressure Range 4.5 inches w.c. to 15.5 psig (11.2 mbar to 1.1 bar)
Orifice Sizes and Color Code R522: ■ 1/8-inch (gray) R522H: ■ 13/64-inch (tan)
1. The pressure/temperature limits in this manual, and any applicable code or standard limitations, should not be exceeded.
Material Temperature Capabilities(1) – 40°F to 160°F ( – 40°C to 71°C)
(1)
©Fisher Controls International, Inc., 1992; All Rights Reserved
Type R522
Table 2. Outlet Pressure Ranges
Key 1
2
3 4 5 6 7 8* 9 10 11 12 13 14 15* 16 19 21 22
Regulator Type number
Outlet Pressure Range
Control Spring Part Number
Control Spring Color Code
R522
4.5 to 6 inches w.c. (11.2 to 15 mbar) 5.5 to 8 inches w.c. (13.7 to 20 mbar) 7.5 to 9.5 inches w.c. (18.7 to 23.7 mbar) 9.5 to 13 inches w.c. (23.7 to 32.5 mbar) 13 to 20 inches w.c. (32.5 to 50 mbar) 20 to 28 inches w.c. (50 to 70 mbar)
T13588T0012 T13589T0012 T13590T0012 T13624T0012 T13592T0012 T13546T0012
Red Yellow Olive Drab Purple Gray Orange
R522H
1 to 2.5 psig (70 to 172 mbar) 2.5 to 5.5 psig (172 to 379 mbar) 5.5 to 10.5 psig (379 to 724 mbar) 10.5 to 15.5 psig (724 to 1069 mbar)
T13593T0012 T13599T0012 T13600T0012 T13601T0012
Blue Green Red Yellow
Description Body 1/2-inch size 3/4-inch size Inlet Fitting 1/4-inch size 1/2-inch size 3/4-inch size Spring Case Assembly Vent Screen Retaining Ring Control Spring Orifice Tube Assembly Orifice Tube O-Ring Orifice Tube Screw Diaphragm/Relief Valve Assembly Closing 00061P08 Adjusting Screw Spring Case Screw Inlet Screw Inlet O-Ring Pipe Plug Screw Screw Inlet Screen
*Recommeded spare part.
Figure 1. Type R522 Regulator Assembly
WARNING A regulator may vent some gas to the atmosphere. 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. Under enclosed conditions, escaping gas may accumulate and be an explosion hazard. In these cases the vent should be piped away from the regulator to a safe location outdoors. While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding the performance, merchantability, fitness
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3. On outdoor installations, regulators installed with vents in positions other than vertically down require additional vent protection from the elements. Such protection may be with separate hood shields, or the Fisher Y602 Series vents. 4. Regulator operation within ratings does not preclude the possibility of damage from debris in the lines or from external sources. A regulator should be inspected for damage periodically and after any overpressure condition. 5. To adjust the regulator, monitor downstream pressure with a gauge during the adjustment procedure. To increase the outlet pressure, the adjustment screw (key 12, figure 1) must be turned clockwise. This requires removal of the closing cap (key 11, figure 1). To reduce the outlet pressure setting, turn the adjusting screw counter-clockwise. Do not adjust the spring to produce an outlet pressure setting above the limit stamped on the regulator. or any other matter with respect to the products, nor as a recommendation to use any product or process in conflict with any patent. Fisher Controls reserves the right, without notice, to alter or improve the designs or specifications of the products described herein. For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France
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