Design complies with the Api 600, Api 602, API 603, BS 1414

Design Features

Design complies with the Api 600, Api 602, API 603, BS 1414.
Face to Facet dimension: ASME B16.10 , BS 2080 and ISO 5752.
Flanged End: ASME B16.5 , 26” and larger sizes according to ASME B16.47
Series A and Series B.
Butt-weld End: ASME B16.25
Inspection and Test: API 598 , BS EN 12266 , ISO 5208

Casting Steel Material

Visual check for cast steel material includes: surface quality, dimension, chemical properties, mechanical performance,
non-distructive testing to ensure that the comprehensive performance of raw materials
comply with the relevant ASTM, BS , EN , JIS standards.


The design provides the whole structure of low flow resistence channel structure,
enables the body stiffness and strenght to bear the nominal piping pressure and stress loading.,
the valve body wall thickness design complies with the API 600 with sufficient margin corrosion resistance for the medium.


Bonnet can be designed with a variety of seal structure of body connection to meet the needs of different operating conditions,
the structure can be equipped to connect with jacketed, flat, spiral or metal ring gasket,
and self pressure-seal valve bonnet for class 900/1500/2500.


Seat structure can b e designed as per user requirements as a whole alloy steel materials pressed-in sealing structure,
welding sealing or screw connection in assembly. The austenitic stainless steel body material can be provided with integral seat.


The wedge structure design can be solid, flexible or parallel dual plates and has enough strenght and stiffness to ensure the valve sealing performance.

Seat and other materials 

The choice of materials for the seat and other seal material can be as per API 600 stadards or users design and manufacturing requirements.