BALL & SEAT APPLICATIONS
Tungsten Carbide: A tungsten and cobalt material with an excellent resistance to corrosive and abrasive conditions. It is a very heavy and dense material, hardness ranges from 88-91 Ra.
Nickel Carbide: A variation of tungsten carbide substituting nickel for cobalt as part of the matrix. The nickel does not leach out like cobalt and therefore maintains the characteristics of the matrix for longer valve life.
Alloy (Rexalloy 44 And 35): A non-magnetic nickel cobalt alloy material with a good performance record under severe conditions of corrosion and moderate abrasiveness. The seat hardness is 55/58 Rc, ball hardness is 58/62 Rc.
440C Stainless Steel: Heat treated to 56/58 Rc on the seats and 58/62 Rc on the balls. This material offers excellent results under conditions of moderate abrasion and mild corrosion.
Titanium: A titanium, carbide and nickel/cobalt composition with a hardness of 90 Ra. This material is similar in hardness to tungsten carbide without the weight, delivering less impact to the seat. It is useful in abrasive and/or corrosive conditions with light gravity fluids where a heavy ball is not needed.
Silicon Nitride: Silicon Nitride, also known as the "Black Ball" is an advanced ceramic material that outperforms all steel, carbide and zirconia ceramic products that are available today. With a hardness of 94 Ra and 40% less weight than other ceramics a silicon nitride ball can be matches to a carbide seat to meet your toughest application. The ball has a totally non-porous surface free of all pores and scratches. (2RMS finish) The virtually inert silicon nitride resists corrosion and galling and stands up in all well environments. The "Black Ball" has very high strength and is virtually impossible to break.
Back to Technical Information
