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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.

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Groth 1800A Manuel d'utilisateur Page 11