HYDROMATIC® AND HYDROTARDER® AUXILIARY BRAKES Standard of the Drilling Industry for over 60 Years Hydromatic® Brakes are available in sizes to meet every need for drilling to depths well below 35,000 feet and for all sizes of well servicing rigs. The range of sizes and maximum recommended operating speeds include the following: SIZE MAXIMUM PRESSURE PSI **MAXIMUM SPEED RPM MAX SHAFT DIA. INCHES VOLUME IN GALLONS WEIGHT OF BRAKE LBS. *BRAKE CAPACITY HP 111-300 25 2300 1-3/4 1 180 300 112-500 25 2300 2 3 265 500 15DR 25 2300 3-1/8 6 580 1600 121 25 2300 3-1/8 2 300 800 122 25 2300 3-1/8 3-1/4 432 1600 201 25 1550 5 5 980 1500 22SR 25 1550 4-15/16 10 1200 2500 202 25 1550 5 9-1/10 1475 3000 22DR 25 1550 4-15/16 20 2300 4000 V-80® 15 1550 5 13-1/2 1240 5000 SSR28 15 900 5 17 2120 5500 262 15 850 5-1/2 30 2650 6000 341 15 600 7-1/2 35 3400 6000 341A 15 600 7-1/2 35 2465 6000 +4OSR 15 570 7-1/2 68 3400 6000 342 15 600 7-1/2 56 5300 7500 342A 15 600 7-1/2 56 3900 7500 +46SR 15 500 7-1/2 80 5000 7000 6OSR 15 375 7-1/2 180 9500 8000 451 15 500 7-1/2 78 3700 8500 481 15 450 7-1/2 98 7500 9000 V200 15 480 7-1/2 96 9100 10000 V295 15 350 9-1/4 315 26880 12000 _________________________________________________________________________ Brakes are furnished with special shafts to customer's specifications up to the maximum shaft diameter shown. + Obsolete Models * Based upon maximum possible fluid flowrate through the brake. ** Based upon maximum rotor RPM and attainable at a flowrate and horsepower less than maximum.  Parmac's new generation of Hydromatic® Brakes are more efficient for their size and weight. These include the following models: 121, 122, 201, 202, SSR28, 262, 341, 342, 451 and 481. These newer brakes have an improved sealing arrangement for better sealing and longer seal life, which also simplifies their replacement. Some of these new models offer easier controllability, and will fit in the old cradle without modification.  SEAWATER MODELS--Standard brakes require fresh water, free of all foreign substance. When seawater is the most economical and readily available water source, certain models of Seawater Hydromatic® brakes can be made available.  HELICOPTER TRANSPORTABLE--Brake models 341A, 342A, and 451 are special brakes with aluminum components, and weigh less than 4,000 lbs. The 481 and V200 brake models can be furnished with some aluminum parts to reduce weight.  When you need auxiliary braking capacity on your rig or semi, contact Parmac, the Auxiliary Brake People.

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