Groth 1800A User Manual
Page 11

Page 11 of 17
APPENDIX A: Model 1800A Pressure/Vacuum Relief Valve
ITEM
DESCRIPTION
STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM
CARBON STL
316 SS
1
BODY
AL(GR 356-T6)
CS(GR WCB)
316 SS(GR CF-8M)
2
HEX NUT
SS
SS
SS
3
LOCK WASHER
SS
SS
SS
4
FLAT WASHER
SS
SS
SS
5
STEM GUIDE
ALUM
CS
316 SS
6
HEX JAM NUT
SS
SS
SS
7
LIFTING LUG (3"-12" ONLY)
GALV CS
GALV CS
GALV CS
8
WEATHERHOOD POST
316 SS
316 SS
316 SS
9
PRESSURE SCREEN
316 SS
316 SS
316 SS
10
WEATHERHOOD
ALUM
CS
316 SS
11
PRESSURE STEM
316 SS
316 SS
316 SS
12
PRESSURE PALLET (1) (NOT SHOWN)
316 SS
316 SS
316 SS
13
*
PRESSURE DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN)
FEP
FEP
FEP
14
*
PRESSURE, DIAPHRAGM, BACKUP (2) (NOT SHOWN)
FEP
FEP
FEP
15
RETAINER PLATE (NOT SHOWN)
316 SS
316 SS
316 SS
16
FLAT WASHER (NOT SHOWN)
SS
SS
SS
17
HEX EXPANDING LOCK NUT (NOT SHOWN)
SS
SS
SS
18
GUIDE ROD
316 SS
316 SS
316 SS
19
COVER
AL(GR 356-T6)
CS(GR WCB)
316 SS(GR CF-8M)
20
VACUUM STEM
316 SS
316 SS
316 SS
21
STUD
SS
SS
SS
22 *
COVER
GASKET
PTFE
PTFE
PTFE
23
VACUUM PALLET (1) (NOT SHOWN)
316 SS
316 SS
316 SS
24
*
VACUUM DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN)
FEP
FEP
FEP
25
*
VACUUM DIAPHRAGM, BACKUP (2) (NOT SHOWN)
FEP
FEP
FEP
26
VACUUM RETAINER PLATE (NOT SHOWN)
316 SS
316 SS
316 SS
27
SEAT INSERT (6"-12" ONLY) (NOT SHOWN)
316 SS
316 SS
316 SS
28
*
O-RING (6"-12" ONLY) (3) (NOT SHOWN)
FKM
FKM
FKM
29
SET SCREW (6"-12" ONLY) (NOT SHOWN)
SS
SS
SS
30
VACUUM SCREEN ASSY. (OPTIONAL)
316 SS
316 SS
316 SS
31
SEAT INSERT (2"-4" ONLY) (NOT SHOWN) (4) N/A
316
SS
N/A
32
PALLET WEIGHT (5) (NOT SHOWN)
LEAD
LEAD
LEAD
* SPARE PARTS
(1) PALLET ALSO AVAILABLE IN ALUMINUM.
(2) Fluoropolymer IS A REGISTERED TRADEMARK OF E.I. DU PONT DE NEMOURS AND CO. USED UNDER LICENSE.
(3) ELASTOMERS ALSO AVAILABLE IN AFLAS, BUNA-N, EPDM & FFKM
(4) SEAT: CS UNITS – WELDED
(5) AVAILABLE IN 316 SS; CONSULT FACTORY FOR ALT. MATERIALS.