SERVICE NON SOUR SOUR CORROSION RESISTANT
ITEM NO. PART NAME TEMPERATURE RANGE TEMPERATURE RANGE TEMPERATURE RANGE
T=-45 0Cup to+120 0C T=-29 0Cup to+220 0C T=-45 0Cup to+120 0C T=-2 0Cup to+220 0C T=-200 0Cup to+200 0C
1 BODY ASTM A350 LF2 ASTM A105 ASTM A350 LF2 ASTM A105 ASTM A182 F316 OR 316L
2 END ADAPTER ASTM A350 LF2OR A694 (3) ASTM A105OR A694 (3) ASTM A350 LF2OR A694 (3) OR A694 (3)ASTM A105 ASTM A182 F316 OR 316L
3 BALL ASTM A350LF2 ENP (4) ASTM A105ENP (4) ASTM A350LF2 ENP (4) ASTM A105ENP (4) ASTM A182 F316(5)
4 SEAT RING ASTM A350 LF2ENP (4) ASTM A105ENP (4) ASTM A350 LF2ENP (4) ASTM A105ENP (4) ASTM A182 F316 OR A564TYPE 630 (17-PH) (5)
5 SEAT INSERT(6) Therban or VitonGF(7) (8) (9) PTFE OR NylonOR Kel-F PTFE OR Nylon OR Kel-F PTFE OR Nylon OR Kel-F
6 SEAL(6) STD Therban or VitonGF(9) Nitrile or Viton (9) Therban or VitonGF (9) PTFE + Inconel x 750 (10)
FIRE SAFE VitonGF (9) Viton (9) VitonGF (9)
7 SPRING (STD& FIRE SAFE) ASTM A316 TYPE 302 Inconel x 750 ASTM A316 TYPE 302
8 STEM AISI4140 ENP(4) OR AISI4340 ENP(4) ASTM A564 Type 630(17-4PH) ASTM A316 TYPE 302
9 ADAPTERFLANGE ASTM A350 LF2 ASTM A105 ASTM A350 LF2 ASTM A105 ASTM A182 F304
10 BOLT ASTM A320 L7 ASTM B193 B7 ASTM A320 L7M ASTM B192 B7M ASTM A320 B8
11 NUT ASTM A194 Gr4 ASTM A194 2H ASTM A194 Gr2M ASTM A194 Gr8
* For other trim materials, CVI can make them at customer’s request.

NOTES:

(1) Service covered by NACE MR-01-75 Code requirements (limited hardness).

(2) Elastomeric seals are not permitted.

(3) It is used for valves to be butt welded to high-strength pipelines.

(4) ENP = Electroless Nickel and/or Chrome Plating.

(5) Hard plating is needed when erosive phenomena are present.

(6) Selection of gasket material is according to the following temperature ranges:

Therban (HNBR) for T=-45℃ up to +175℃; Viton GF for T=-40℃ up to + 220℃;
Nitrile ( NBR) for T= – 29℃ up to + 130℃; Viton- ( FPM) for T=-20℃ up to
+ 220℃;

PTFE for T= – 200℃ up to + 240℃; Nylon 12G for T= – 50℃ up to +120℃; Kel-
F
for T= – 250℃ up to + 150℃.
(7)Nylon 12G is used for valves pressure ≥ANSI600

(8)Seat insert made of PTFE reinforced with glass or graphite fiber is supplied
on request.

(9) Special elastomers are supplied on request for “Crack on relief ” proof.

(10) Spiral wound gasket (ANSI 316 + Graphite) is used for body seals.

(11) CVI reserves the right to change the materials complying with specifications
without any notice.

 

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