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