Valve Balls & Valve Seats with API Standard
Our ball-and-seat valves are designed and manufactured according to API 11AX Specification for Subsurface Sucker Rod Pumps and Fittings (current edition). Each ball-and-seat combination is vacuum tested to ensure a perfect seal is obtained in all positions of contact.
Available materials and qualities to be used in assemblies of the same or combined materials are as follows:
1. Stainless Steel: API symbol A1
2. Cobalt Alloy: API symbol B2
3. Tungsten Carbide: API symbol C1
4. Nickel Carbide: API symbol C2
5. Titanium Carbide: API symbol C3
main material for reference:
Symbol | Symbol | Hardness | Material |
A1 | Stainless Steel | Ball: HRC 58-65 Seat: HRC 52-56 | UNS 41000-UNS 44000 |
B1 | Cobalt Alloy, Cast | Ball: HRC 56-63 Seat: HRC 50-56 | Cobalt, chromium, and tungsten alloy |
B2 | Cobalt Alloy, Powder Metal | 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 binder |
C3 | Titanium Carbide | Ball: HRA 89-90.5 Seat: HRA 89-90.5 | Tungsten and titanium carbide with cobalt binder |
valve balls main specifications for reference:
Size | Ball Diameter (in) | API Symbol |
106 | 5/8 | V11-106 |
9/16 | ALT |
125 | 3/4 | V11-125 |
11/16 | ALT |
150 | 15/16 | V11-150 |
7/8 | ALT |
175 | 1-1/8 | V11-175 |
1 | ALT |
200 | 1-1/4 | V11-200 |
1-1/8 | ALT |
225 | 1-3/8 | V11-225 |
1-1/4 | ALT |
250 | 1-11/16 | V11-250 |
1-1/2 | ALT |
325 | 2 | V11-325 |
375 | 2-1/4 | V11-375 |
2 |
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