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APPENDIX E: Model 1860A Pressure Relief Valve

ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION

ALUMINUM CARBON STL 316 SS

1 OUTLET AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)

2 LOCK WASHER SS SS SS

3 HEX NUT SS SS SS

4 STUD SS SS SS

5 COVER AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)

6 PRESSURE STEM 316 SS 316 SS 316 SS

7 * COVER GASKET PTFE PTFE PTFE

8 GUIDE ROD 316 SS 316 SS 316 SS

9 PRESSURE PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS

10 * PRESSURE DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP

11 * PRESSURE DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP

12 PRESSURE RETAINER PLATE (NOT SHOWN) 316 SS 316 SS 316 SS

13 FLAT WASHER (NOT SHOWN) SS SS SS

14 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS

15 * INLET GASKET PTFE PTFE PTFE

16 LOCK WASHER SS SS SS

17 HEX NUT SS SS SS

18 STUD SS SS SS

19 INLET AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)

20 PIPE PLUG 316 SS CS 316 SS

21 SEAT INSERT (6"-12" ONLY) (4) (NOT SHOWN) 316 SS 316 SS 316 SS

22 * O-RING (6"-12" ONLY) (3) (NOT SHOWN) FKM FKM FKM

23 SET SCREW (6"-12" ONLY) (NOT SHOWN) SS SS SS

24 SEAT INSERT (2"-4" ONLY) (4) (NOT SHOWN) N/A 316 SS N/A

25 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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