MANUFACTURING STANDARDS : API-600 FACE TO FACE AS PER ANSI B 16.10 ENDS : FLANGED END AS PER ANSI B 16.5 R.F & BUTTWELD AS PER ASME B 16.25 TESTED AS PER API 598 AVAILABLE WITH HAND WHEEL , GEAR & PNEUMATIC ACTUATOR OPERATED SIZES AVAILABLE FROM 15mm TO 600mm