Groth 1800A - Manual (Page 13)

Page 13 of 17
APPENDIX C: Model 1820A Pressure/Vacuum Relief Valve
ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM CARBON STEEL 316 SS
1 BODY AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
2 STUD SS SS SS
3 HEX NUT SS SS SS
4 LOCK WASHER SS SS SS
5 PIPE PLUG 316 SS CS 316 SS
6 OUTLET AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
7 LOCK WASHER SS SS SS
8 HEX NUT SS SS SS
9 STUD SS SS SS
10 COVER AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
11 PRESSURE STEM 316 SS 316 SS 316 SS
12 * COVER GASKET PTFE PTFE PTFE
13 GUIDE ROD 316 SS 316 SS 316 SS
14 PRESSURE PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
15 * PRESSURE DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
16 * PRESSURE DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
17 PRESSURE RETAINER PLATE (NOT SHOWN) 316 SS 316 SS 316 SS
18 FLAT WASHER (NOT SHOWN) SS SS SS
19 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS
20 * INLET GASKET PTFE PTFE PTFE
21 GUIDE ROD 316 SS 316 SS 316 SS
22 VACUUM STEM (NOT SHOWN) 316 SS 316 SS 316 SS
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)(3) (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) SS SS 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) (4) (NOT SHOWN) N/A OPTIONAL 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.