Type R rotary union
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Catalog excerpts

Type R rotary union - 1

tarv Unions For water, air, steam, and thermal oil service Advanced rotary

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Single flow rotary union Dual flow rotary union Quick Select Chart O Recommended O Acceptable • Not Recommended Do not operate unions at maximum values of pressure, temperature, and speed.

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ball bearings steel springs secondary seal steel rotor secondary seal Antimony graphite, tungsten carbide Silicon carbide • 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 • Silicon carbide counterseat • 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 • Materials selected for...

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Single flow straight thread rotor Dual flow rotary straight thread rotor

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sure Speed sure Speed • Media: Water, Steam Single flow straight thread rotor Dual flow rotary straight thread rotor

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Union type RHB is designed to work at 400°C and high rotation speed. Such performance can be reached using two special seals with double balancing and with the interposition of a pressurized fluid for cooling of primary seal. This fluid is circulated by a pumping and cooling group which continuously verifies the system's effectiveness and signals through visual and sound alarm possible variations from the set values. These results are reached using ball bearings with closed loop oil cooling. Oil sealing is obtained by two double balanced seals which guarantee the effectiveness of system...

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ball bearings vent holes Metal gasket Stainless steel Smooth flow secondary seal Antimony graphite, Silicon carbide secondary seal • Springs located outside the flow area • Carbon steel-nickel coated 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 • Silicon carbide counterseat • Improved reliability, increased flow area • Corrosion resistant • Reduced down-time and cost of maintenance • Robust design, no risk of o-ring slipping • Extended operating...

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Dual flow • Media: Water, Steam

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Easy seal replacement The R line has a unique feature. The complete line from W to 6" is featured with a Quick Replacement Design (QRD). This feature will allow you to repair the R union while the union is still installed on the machine. The Johnson-Fluiten R union is the only one offering this feature in a ball bearing line. The R union is designed for long operating life and short maintenance time to guarantee the best operating times for your product line. Repair Kits

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Seal Replacement Loosen and remove socket head cap screws (2A) and set aside. Remove head (2). Remove seal ring (5), o-ring (12), and springs (7) from head (2) and discard. Remove counterseat insert (6), and o-ring (12) from nipple (4) and discard. Carefully clean the o-ring end of the nipple (4) and the bore of the head (2) where the seal ring (5) sits. Do not scratch surfaces. This maybe done using a Scotch Brite pad. Apply a small amount of o-ring lube to both sides of a new o-ring (12) and fit it over the end of the new seal ring (5) into the o-ring groove. Insert new springs (7) into...

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Quick Release Flange Split Metal wedge Q-gasket • Split wedge construction for ease of installation • Q-flange can be used for LH and RH rotation • Gasket for different media • Mounting with multiple bolts • Size available from V2" to 12" • Reduced installation and maintenance times • Reduced inventory levels • Easy installation with hand tools Quick Release Flanges are used for increased ease of installation and reduced maintenance cost. The quick Release Flange can be used for steam, water, oil, and all other media which passes through the rotary joint.

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Fixed Flange Connections Fixed flanges type F for rotor Dimensions subject to change without notice. Flanged version - Single passage Dimensions subject to change without notice. Flanged version - Double passage Dimensions subject to change without notice.

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Technical Data Rotary union sizing Rotary unions that are used for liquid flow are typically sized so that the pressure drop is less than 0,20 bar for open- loop system and less than 0,40 bar for closed-loop system. The pressure drop through a dual flow rotary union is higher than the pressure drop through a single flow union of the same size, because the internal flow area is lower. Use the appropriate chart below for your configuration. Note that the pressure drop shown for dual flow unions is for the supply passage. The total pressure drop (flow in and flow out) would be approximately 2x...

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Flexible hoseRatings To ensure free movement of the rotary union and elimination of side loading, the proper installation, type, and length of flexible hose should be used. Recommended hose length, bend, and offset (mm) Threaded both ends Threaded one end, lap flange other end Fixed flange one end, lap flange other end Minimum bend radius T Compound hose It is important to follow the filtration requirements recommended by the machinery manufacturer. Type R rotary unions do not require additional filtration other than what is recommended for the fluid circulation system (typically 40-60...

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Rotary Joint Selection Ordering information Johnson-Fluiten If you have an existing rotary union with a product label affixed to the housing, the part ID written on the label is all that is required to order a replacement union. For new applications or if no part ID is available, the following data are requested: 1. Number passages (single flow or dual flow) 2. Rotor type (threaded, Q-flange, or integral flange) 3. Rotor thread (right-or left hand and type) 4. Supply pipe (fixed or rotating) 5. Service (water, thermal oil, air, or stream) 9. Connection sizes shown on drawing (M, P, S, K)...

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