The 3893-802 (formerly 3893-801) variable volume is used as the variable volume in the current model 3990 Manual Pressure Control Pack: 3990 Manual Pressure Control Pack Manual
The 3893 variable volume is available for sale as a standalone variable volume:
Part Number: 3875348
Description :3893-802,PRES ADJ ASSY PRECISE, VAC/3KPSI
There is a seal kit available for the 3990 Manual Pressure Control Pack
Part Number: 4862346
Description: 3990 SERVICE,3990 SEAL REPLACEMENT KIT
Here are the contents of the seal kit. See the attached Excel file for locations.
Part Num Qty Description
3905708 2 54-900-5,O-RING BUNA N 90 DUROMETER, .070XC,.241OD, .101ID
3865075 1 54-700-4,O-RING:BUNA-N .070 X .070 XSEC
3865518 3 54-704-6,O-RING:NEOPRENE,AMS006N1 1-70 (1/8 X 1/16)
3905683 1 54-704-214,O-RING:NEOPRENE,1X1 1/4X1/8 SEC
3865479 1 54-704-128,O-RING:NEOPRENE,1 1/2X3/32XSEC
3865468 2 54-704-11,O-RING NEOPRENE 5/16 X 1/16 XSEC
3905618 2 O-RING,BACKUP,TEFLON,SINGLE TURN,# MS28774-005
3904996 1 45-351,GREASE KRYTOX GRADE GPL-203 PACKAGED IN A 1/2 OUNCE SYRINGE
3896464 1 3891-1-4,BUSHING -PREC PRES CONTRLR
As of 21-October-2022 the adjustment tool is no longer included with the seal kit. The tool is included when the 3990 or 3893 controller is purchased new, and is available separately as this part number.
3896514 3891-1-10,TOOL VALVE ADJ -PRECISE PRES CONTRLR
To get pricing, an official quote sent, or place order can call +1.877.355.3225 and ask for our Orders group or can reach them through orders@flukecal.com
*** Later 3990's with Fluke Calibration labeling (~2019) had some changes, but the VV assembly is still backwards compatible to older 3990's.
