Feature：
1. As the line pressure increase , our seat design originates a piston effect the sealing resilient insert against the ball, in absence of the pressure or with low pressure, the seats are forced against the ball by set of preloaded springs..
2. The ball is supported by the up and down bearings, so no relevant position movement underpressure.
3. Inner lined with good anti-abrasion cast stobe to improve the durability.
4. Flow resistance factor is small, the flowing capacity is big, and the meduim will not stay in the valve body.
5. Supersonic Spray processing for ball surface, the sealing properties and durability can reach international high level.

Standard:
Design and Manufacture:API 6D, ASME B16.34, BS 5351, API 608, MSS SP-72
Face to Face Dimension: ASME B16.10, API 6D, EN 558
Flange Connection Dimension:ASME B16.5 (DIN 2501)
BW Connection Dimension:ASME B16.25
Pressure-Temperature Ratings:ASME B16.34
Test and Inspection:API 598, API 6D

Structure：