Y610, Y611, & Y612 Series
Fisher Controls
Instruction Manual
Y610, Y611, & Y612 Series Vacuum Service Equipment and Relief Valves July 1986
Form 1477
Incorporates June 1994 Errata Sheet–See Page 20
Introduction Scope of Manual This manual describes and provides instructions and parts lists for Y610, Y611, and Y612 Series vacuum service equipment and relief valves. Instructions and parts lists for other equipment used with these regulators are found in separate manuals.
Product Description The Y610, Y611, and Y612 Series devices are used in a wide variety of vacuum and relief service applications. The Y610 Series devices (figure 1) are used as vacuum breakers, the Y611 Series devices are used as either vacuum breakers or relief valves, and the Y612 Series devices are used as vacuum regulators, and are described as follows: Type Y610—Self-operated vacuum breaker with upwardpointing 1/4-inch vent connection, and internal registration requiring no downstream control line. Type Y610A—Larger-size Type Y610 with 1-inch NPT screened side vent. Type Y610AP—Same as Type Y610A except with blocked throat, diaphragm case assembly tapped 1/2inch NPT for control line connection, and O-ring stem seal. Type Y611—Self-operated relief valve with upward pointing 1/4-inch NPT vent connection, and internal registration requiring no downstream control line.
W1094-1
Figure 1. Type Y610A Vacuum Breaker Type Y611AP—Self-operated vacuum breaker with blocked throat, 1-inch NPT screened side vent, diaphragm case assembly tapped 1/2-inch NPT for control line connection, and O-ring stem seal. Type Y611AKP—Type Y611AP for higher pressure settings. Type Y611C—Self-operated relief pilot with upward pointing 1/4-inch NPT vent connection, diaphragm case assembly tapped 1/2-inch NPT for control line connection, and solid throat.
Type Y611A—Larger-size Type Y611 with 1-inch NPT side screened vent.
Type Y611P—Self-operated vacuum breaker with blocked throat, upward pointing 1/4-inch NPT vent connection, diaphragm case assembly tapped 1/2-inch NPT for control line connection, and O-ring stem seal.
Type Y611AK—Type Y611A for higher pressure settings.
Type Y611RR—Type Y611C with bleed hole in throat, typically used as pilot for Type 66RR relief valve.
©Fisher Controls International, Inc., 1973, 1986; All Rights Reserved