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P. 45

      REPLACE DISC AND/OR SEAT:
REPLACE STUFFING BOX PACKING:
• If lower stem half (13) remains in valve body after seal retainer ring (16) has been removed, hold cap collar (2) and insert a 1⁄4” thick x 2” wide piece of plate into the slots on the bottom of the lower stem half and unscrew it from the upper stem half.
• Remove main spring (12), washers (8) & (11) and stuffing box spring (10).
• Remove old packing (9) and wiper (7) and replace with new.
REPLACE MAIN SEAL:
• If lower stem half (13) unscrews from upper stem half 95) it will be necessary to
clamp the lower stem half (13) in a vice to unscrew seal retainer ring (16).
• After removing seal retainer ring (16), remove old main seal and install new. • Care should be taken not to damage seal surface of lower stem half (13).
• Hold cap collar (2) and remove cap nut (1) and remove disc (3).
• Care should be taken not to lose Teflon washer (4).
• Remove seat (6), use care not to damage seat surface of seat flange.
• Install new disc (3) and/or seat (6).
REPLACE STUFFING BOX PACKING OR MAIN SEAL:
• Disconnect hydraulic line and unscrew indicator pins (19) and piston holder
assembly (14) & (18).
• To ensure disc (6) does not get damaged, hold cap collar (2) stationary while
using a spanner wrench (BET 16236MS) to unscrew the seal retainer ring (16).
Seat w/ 0-rings
Replacement Kit of Teflon® Parts:
BET CH75296TF - Includes items - 4,6,7,8,9,10,15,20,21
BET CH75296TFTS - Includes items - 4,6a,6b,7,8,9,10,15,20,21
Conversion/Rebuild Kit:
To Convert from Old Style Single Piece Stem to New Style 2-Piece Stem
BET CH75297TF - Includes items - 4,5,6,7,8,9,10,13,14,15,16,17,18,20,21
BET CH75297TFTS - Includes items - 4,5,6a,6b,7,8,9,10,13,14,15,16,17,18,20,21
 Key
 Description
 Req
  Material
  Part Number
 1
  Cap Nut
  1
   316 Stainless
   BET 16672SS
  2
 Cap Collar
   1
  316 Stainless
 BET 16671SS
  3
  Disc
  1
    316 Stainless
  BET 16743SS
  Hast C-22 Trim
   BET 16743LH
 4
  Teflon Washer
  1
  Teflon
 GSK 16690TF
  5
   Upper Stem Half
   1
     316 Stainless
  BET 28202SS
  Hast. C276
   BET 28202HC
  6
  Replaceable Seat
  1
    Teflon®
 BET 16644TF
 Kalrez
  BET 16644KA
 6a
   Replaceable Seat w/ O-Rings
  Teflon®
   BET 18897TFTS
  Kalrez
 BET 18897KA
 6b
   Seat O-Ring only
 2
    Tef-Sil
  BET 18246TS
  Kalrez
  BET 18246KA
 7
  Wiper
  1
   Teflon®
   BET 15862TF
 Key
 Descriptoin
 Req
  Material
  Part Number
 8
 Follower Washer
  1
   316 Stainless
   BET 19594SS
   9
Packing Rings
  Set of 3
 Teflon®
 BET 15759TF
 10
 Spring - Stuffing Box
 1
  316 Stainless
  BET 19616SS
 11
 Washer - Main Spring
  1
   304 Stainless
   BET 15684SL
   12
Main Spring
  1
 Chr. Van.
 BET 18850EY
 13
 Lower Stem Half
 1
  303 Stainless
  BET 28201SL
 14
 Piston
  1
   303 Stainless
   BET 75136SL
   15
Main Seal
  1
 302 SS/PTFE
 BET 75207SSTF
 16
 Seal Retainer Plug
 1
  303 Stainless
  BET 75190SL
 17
 Piston O-Ring Seal
  1
   Tef-Sil
   BET 75206TS
   18
Piston Holder
  1
 316 Stainless
 BET 75137SS
 19
 Indicator Pins
 2
  304 Stainless
  BET 16133SL
 20
 Seal Washer
 1
  Fiber
  BET 9Z6185
 21
 Bearing
  1
   Carbon PTFE
   BET 75455TF
 To locate the Polar Service Center nearest you, please call 1-877-534-2076 west of the Continental Divide and 1-800-955-8558 east of the Continental divide or visit our website at: www.polarcorp.com 1-45
Chemical Trailer Parts Catalog Hydraulic Valves
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