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4.3.2 Coat all sleeve O-rings with 

silicone lubricant and install 

them onto the sleeve. See 

Figure 11. 

Note:  Earlier versions of the P-50 

utilized a different pin drive design 

which does not require O-ring. If the 

pin in the sleeve is not grooved for an 

O-ring, the O-ring will not be used. 

Note:  If Duraflon encapsulated 

O-rings are to be installed, contact 

your local Flowserve repair facility for 

proper installation.

4.3.3 Install the rotor onto the sleeve 

aligning the drive slot with the 

pin. See Figure 12.

4.3.4 Install the rotor retaining ring

Be careful not to nick, scratch or 

 

damage the rotor face.

4.3.5 Place the sleeve/rotor assem-

bly rotor face up and clean the 

face with alcohol. 

 

See Figure 13.

4.3.6 Install new springs into the 

stator, clean the stator face 

with alcohol and place it down 

onto the rotor. Be sure the 

springs are placed in the proper 

(deeper) holes. See Figure 14.

Figure 12

Figure 13

Figure 11

Figure 14

Summary of Contents for Durametallic P-50

Page 1: ...Installation Instructions Durametallic P 50 Experience In Motion A cartridge mounted flexible stator pusher seal design for general service applications...

Page 2: ...lation according to the following steps will assure long trouble free life of the P 50 seal 1 Equipment Check 1 1 Follow plant safety regulations prior to equipment disassembly Lock out motor and valv...

Page 3: ...the P 50 with care it is manufactured to precise tolerances The stationary and rotating sealing faces are of special importance They are lapped flat to within three light bands 34 8 millionths of an i...

Page 4: ...00 2 12 7 19 7 25 1 19 4 69 4 81 5 00 5 25 2 750 3 625 4 000 3 50 3 750 2 00 2 12 7 69 7 75 1 19 4 81 4 94 5 12 5 38 2 875 3 750 4 125 3 62 3 875 2 00 2 12 7 94 8 00 1 19 4 94 5 06 5 25 5 50 3 000 3...

Page 5: ...ation An open end wrench for the gland bolt nuts 1 8 Allen wrench provided 3 32 Allen wrench provided 3 16 Allen wrench provided for sizes 2 250 inch 2 2 Lubricate the shaft or sleeve lightly with sil...

Page 6: ...seal parts and cause leakage 2 6 Assemble the pump Avoid pipe strain Align coupling properly 2 7 With the impeller shaft coupling and bearings in their final operating positions tighten the P 50 set s...

Page 7: ...e seal flushsystemisoperating Ventairfromthecasingofthepumpand the seal chamber before startup 3 4 Observe the start up If the seal runs hot or squeals check the seal flush system Do not allow the equ...

Page 8: ...ovided 3 16 Allen wrench provided for sizes 2 250 inch Stator Rotor O rings Set Screws Centering Tabs Retaining Ring Gasket O ring Springs O ring Half Dog Set Screws For special problems encountered d...

Page 9: ...the gland and discard Note Parts which should be discarded include the O rings gasket springs centering tabs and centering tab cap screws and set screws Parts which may be reused if in satisfactory c...

Page 10: ...cal Flowserve repair facility for proper installation 4 3 3 Install the rotor onto the sleeve aligning the drive slot with the pin See Figure 12 4 3 4 Install the rotor retaining ring Be careful not t...

Page 11: ...by one quar ter turn after bottoming 4 3 11 Install the centering tabs by pressing the gland ring down to compress the springs Lo cate the tab lips into the gap between the gland and sleeve collar See...

Page 12: ...train its employees and contractors in the safe use of Flowserve products in connection with the specific application While the information and specifications contained in this literature are believe...

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