Table of Contents
(Manual Revision 1, August 1998)
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
2. Disassembly
Series 2850 and 2852 . . . . . . . . . . . . . . . . . . . . .Page 2
Series 1890 and 1892 . . . . . . . . . . . . . . . . . . . . .Page 3
3. Lifting Lever Assemblies
Open Lifting Lever . . . . . . . . . . . . . . . . . . . . . . . .Page 4
Packed Lifting Lever . . . . . . . . . . . . . . . . . . . . . .Page 4
4. Lapping Procedure . . . . . . . . . . . . . . . . . . . . . . .Page 5
5. Assembly
Series 2850 and 2852 . . . . . . . . . . . . . . . . . . . . .Page 6
Series 1890 and 1892 . . . . . . . . . . . . . . . . . . . . .Page 6
6. Testing and Setting . . . . . . . . . . . . . . . . . . . . . . .Page 7
Appendix A: Critical Seat Dimensions . . . . . . . . . .Page 8
© 1998 Teledyne Fluid Systems
10195 BRECKSVILLE ROAD
BRECKSVILLE, OHIO 44141 USA
PHONE: (440) 838-7690
FAX: (440) 838-7699
www.cwfc.com
1. Introduction
This manual contains sufficient information
to allow trained maintenance personnel to
properly repair types 1890, 1892, 2850,
and 2852 pressure relief valves.
All of the assembly and disassembly
instructions refer to types with plain
screwed caps. When repairing types with
either open or packed lifting levers, refer
to Section 3 which describes the removal
of the appropriate lever assembly.
If a valve repair requires replacement
parts, only factory-supplied components
shall be used. Use of parts from other
than the original manufacturer will lead
to potentially dangerous operating condi-
tions. If faced with repairs exceeding the
scope of this manual, contact the Farris
Factory.
1
Farris Engineering
Division of Cur tiss-Wright Flow Control Corporation
Visit www.boighill.com to request a quote.
Visit www.boighill.com to request a quote.
