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CODE

INSTRUCTION

HARDNESS

MATERIAL

A1

Stainless steel

Ball: HRC 58-65

Seat: HRC 52-56

UNS 41000–UNS 44000
9Cr18Mo  & 6 Cr18Mo

B1

Cobalt alloy casting

Ball: HRC 56-63

Seat: HRC 50-56

Cobalt, chromium and tungsten alloy

B2

Cobalt alloy, powder metallurgy

Ball: HRC 53-60

Seat: HRC 51-57

Cobalt, chromium and tungsten alloy

C1

Tungsten carbide

Ball: HRA 88-89

Seat: HRA 88-89.5

Tungsten with cobalt adhesive

C3

Titanium carbon compounds

Ball: HRA 89-90.5

Seat: HRA 89-90.5

Tungsten and titanium with cobalt adhesive carbon compounds

V11-106

V11-125

V11-150

V11-175

V11-200

V11-225

V11-250

V11-375

Ball-D

+0.020/–0.010

(+0.51/–0.25)

15.88

(0.625in)

19.05

(0.75in)

23.83

(0.938in)

28.58

(1.125in)

31.75

(1.25in)

34.93

(1.375in)

42.88

(1.688in)

57.15

(2.25in)

Seat-ID  ± 0.050 ±1.27)

11.68

(0.46in)

13.97

(0.55in)

17.02

(0.67in)

20.96

(0.825in)

24.38

(0.96in)

26.92

(1.06in)

33.27

(1.31in)

43.18

(1.7in)

Seat-OD

+0.000/–0.005(+0.00/–0.13)

20.14

(0.793in)

23.32

(0.918in)

29.67

(1.168in)

35.26

(1.388in)

37.54

(1.478in)

43.69

(1.72in)

51.05

(2.01in)

78.03

(3.072in)

Seat-H

+0.020/–0.010

(+0.51/–0.25)

0.500 (12.70in)

0.500 (12.70in)

0.500 (12.70in)

0.500 (12.70in)

0.500 (12.70in)

0.500 (12.70in)

0.500 (12.70in)

0.750 (19.05in)

Note 1: All dimensions in inches (followed by equivalent in millimeters).
Note 2: API ball and seat valves are designed to operate in F22 boxes.
Note 3: Additional ball specifications: ball roundness range to be 0.0001 in. (0.003 mm), maximum; ball surface roughness: 5RA, maximum;ball OD tolerance shall be ± 0.001 in. (± 0.025 mm) for all balls less than 2-inch diameter and ± 0.002 in. (± 0.050 mm) for all balls 2 inches
diameter and over.