Triplex Fluid End Modules:

1,Made from 4130 or 4135 metal and heat treated to a hardness for long wear
2,The clean exterior finish reflects the superior inside quality.
3,Valve and cylinder head plugs 
4,Valve cylinder head threaded rings
5,Valve cylinder head locks
6,Studs and nuts
7,Specialty items

Duplex Fluid Ends:
1,API 7K quality standards
2,Heat-treated and internally hardened for high durability 
3,Pressure up to  5000,7500,and 10000psi
4,   Discharge connections and suction connections on each side or front center.
5,   Made from the premium alloy steel AISI 8620 or 4135
6,   Thermal refining treatment, rigid inspection
7,   The mechanical property : σ b≥850/MPC, σ S≥670/MPC, δ≥15% ψ≥13%.