FLUID HANDLING RX® Rotary Union 2” to 3” Dual Flow The RX rotary union connects stationary piping to a rotating device. The fluid is sealed by precision, micro-lapped seals that provide a uniform, full-flow design. The union is supported by two widely-spaced anti-friction bearings and is available with a bearing isolation system for added bearing protection. The RX union is capable of intermittent dry running and features a 100% pure-molded carbon graphite or silicon carbide seal and tungsten carbide counterseat. Standard RX Ratings Pressure: Speed, flanged rotor: Speed, thread rotor: Consult Kadant Johnson for RX-1, RX-2, and RX-3 unions for applications up to 450°F (232°C). High-pressure RX-4 and RX-5 water unions are available in 2” size up to 400°F (204°C) and 363 psig (25 bar). K A D A N T J O H N S O N LLC Overview Features • Springs located outside the flow area • Stainless steel rotor • Two-piece housing, on-machine seal replacement • O-rings fully captured in glands • Balanced seal assembly • Full flow area • Matched seal faces • Bearing isolation system available • Tungsten carbide counterseat Benefits • Improved reliability, increased flow area • Corrosion resistant • Reduced down-time and cost of maintenance • Robust design, no risk of o-ring slipping • Extended operating life • Low pressure drop • Materials selected for specific service • Increased bearing protec

NPT Rotating Fixed Pipe Pipe OD Approx. Weight Rotating Pipe Part ID Fixed Pipe Taper thread nipple *Lock-up dimension for straight threads. J 3” integral flange Part ID Fixed Pipe Rotating Pipe Approx. Weight * For 2” and 2 ⁄2” sizes, the ‘B’ dimension is the ID of the counterbore. Counterbore depth is 0.25” (6.4 mm). For 3” size, the ‘B’ dimension is the OD of the pilot. Pilot length 0.30” (7.6 mm). 1