installation of john crane type 37 mechanical · pdf file05 of 11 . installation of john crane...

XCEL Series of Turbine Mixers
Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 01 of 11
Installation of John Crane Type 37 Mechanical Seal
1. General Be sure to read all instructions carefully before installing seal to prevent the potential mismatch of the two sealing halves. Consult the general arrangement drawing and applicable notes included with the actual seal. The John Crane Type 32 Seal is a precisions product. To assure satisfactory operation, handle seal with care. Take particular caution to see that the lapped sealing faces are not scratched or marred. Absolutely no grease or lubricant is to be used on the shaft during installation. Part Name
1- Mating Ring 2- Compression Ring 3- Mating Ring 4- Sealing Ring 5- Drive Ring Assembly 6- Clamp Ring 7- Cap Screw 8- Cap Screw 9- Set Screw 10- Cap Screw 11- Gland Plate Assembly 12- Cap Screw 13- Compression Tool 14- Cap Screw 15- Installation Kit (w/seal)**
**Installation Kit: -Allen Wrenches -Silicone Grease -RTV Sealant -Adhesive -Alcohol Prep Pad -Screwdriver
UET Mixers Inc. 26 Maple St. Mechanic Falls, ME 04256 Tel: (207)-345-3330 Toll Free: (888)-838-9131 Fax: (603)-627-9328

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 02 of 11
2. Preparing the Equipment
A. Determine squareness of seal chamber face B. Measure shaft run out (0.010 T.I.R max.) to shaft. Carbon vs. Silicon = 0.050 T.I.R. Max. Carbon vs. Ceramic = 0.050 T.I.R. Max. Silicon vs. Silicon = 0.100 T.I.R. Max.
C. Check stuffing box face waviness (0.030 D. Maximum radial shaft movement T.I.R. max). (.124 T.I.R. max).

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 03 of 11
3. Installing the Stationary Portion of the Seal
A. Place gland plate halves around shaft, B. Apply a thin coat of adhesive to one split end of ensuring beveled ID faces outward of the the compression ring. Place split end around stuffing box. Bolt halves together. Shaft and hold ends together until adhesive bonds the ends. Split must match up identically to ensure a proper seal.
C. Fit compression ring into the ID at the back end of the gland plate. Align bonded split in the compression ring at the 11 oclock position (approx ) from the top end (12 oclock position) of the gland plate. NOTE: to determine 12 oclock position on a: 2 Bolt Gland 12 oclock position = 90 degrees from each stud/bolt. 4 Bolt Gland 12 oclock position = 45 degrees from each stud/bolt. (equally spaced studs/bolts)

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 04 of 11
3a. Installing the Stationary Portion of the Seal (cont.)
D. Slide gland plate assembly containing E. Place on half of mating ring into the ID of the compression ring over mounting studs. Compression ring ensuring lapped and beveled Tighten nuts a few threads to prevent edge faces outward. Splits should be at 90 from gland plate from sliding. the 12 oclock position (i.e. 3 oclock positions). See Figure A.
F. Place other half of mating ring in the Compression ring making sure split ends of halves DO NOT come in contact with each other while sliding into compression ring. This can be achieved by pushing up the rubber at the 12 oclock position using curved end of the mating ring, allowing splits to clear matching half.
CAUTION: To minimize the potential for seal failure, care must be taken not to chip the split ends of the mating rings.

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 05 of 11
3b. Installing the Stationary Portion of the Seal (cont.)
G. Take clamp ring halves and lightly lubricate ID with Silicone grease, starting from ID of split joints continuing around ID approximately on either side.
I. When mating halves are flush axially and radially, hold the compression ring at the 12 oclock and 6 oclock
positions to insure mating ring splits remain locked into place. Place one half of the clamp ring around the compression ring, with splits at the 12 oclock and 6 oclock positions. Place the other half around and bring the two halves together loosely, tightening cap screws a few threads. The splits of the mating ring and clamp ring should be 90 degrees apart. If access to clap ring cap screws is limited, the whole stationary assembly can be removed and/or disassembled from the mounting studs and rotated to provide needed access. CAUTION is required to insure that the mating ring does not bump the shaft.
J. Repeat step H to verify that mating ring splits are flush axially and radially.
H. Make sure the sealing surfaces of the mating ring
halves are flush with one another both axially and radially. Visually and by using your fingernail, determine if there is a step at the joints. Carefully adjust the two halves as need. See figure B.

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 06 of 11
3c. Installing the Stationary Portion of the Seal (cont.)
K. Proceed tightening the clamp ring halves together L. Spread a thin film of RTV sealant on the stuffing Evenly by tightening the screws until clamp ring box face where it will come in contact with the Halves come together firmly. Check frequently that compression ring. If the surface where compression The two mating ring halves remain flush. Adjust as ring contacts the stuffing box is unknown, apply the needed. RTV sealant to the compression ring. M. Take the seal assembly and push it along mounting studs to the stuffing box face. Tighten nuts evenly on
the studs insuring an even gap between the shaft and mating ring ID. Gap should be check visually and measured to verify seal is centered. A centering tool is provided to achieve this. The tool should be placed between the shaft and the mating ring ID to determine that the gap is even. Check at several points around the shaft. After assembly is completely aligned, fully tighten gland plate to stuffing box.

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 07 of 11
3d. Installing the Stationary Portion of the Seal (cont.)
N. Loosely bolt compression tools to the gland plate. The small diameter of the compression tool must face the gland plate. Make sure compression tool grabs OD of clamp ring. Tighten compression tool screws evenly until all four tools contact the gland plate.
4. Installing the Rotating Portion of the Seal
A. Apply a thin coat of adhesive to split end of sealing ring. Place sealing ring around shaft with small ID away from the stuffing box. Hold split ends together until the adhesive bonds the ends. Position the sealing ring split at the 11 oclock position. See Figure C.
Figure C.

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 08 of 11
4a. Installing the Rotating Portion of the Seal (cont.)
B. Place on half of mating ring into the ID of the sealing ring insuring lapped and beveled edge faces inward toward the stuffing box. Splits should be 90 degrees from the 12 oclock position (ie. 3 oclock and 9 oclock position). See Figure D.
C. Place other half of mating ring in the sealing ring D. Take drive ring halves and lightly lubricate ID
making sure split ends of halves DO NOT come with silicone grease, starting from ID of split in contact with each other. This can be achieved joints continuing around ID approximately by pushing up the rubber at the 12 oclock position on either side. with the curved end of mating ring to allow splits to clear matching half. CAUTION: To minimize the potential for seal failure, care must be taken not to chip split ends of the mating rings.

Bulletin 02-825 02/13/2012
Supersedes 10/23/00
Page 09 of 11

installation of john crane type 37 mechanical · pdf file05 of 11 . installation of john crane...

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