METAL SEATED BALL VALVES FOR SEVERE SERVICES

The mining industry requires specialized severe service conditions valves. Some of these conditions such as: Corrosion, Erosion and High Temperatures could be a real problem in the process if the wrong valves are installed.

Slurry Lines:

A slurry pipeline is a specially engineered pipeline used to move ores, such as coal or iron, or mining waste, called tailings, over long distances. A mixture of the ore concentrate and water, called slurry, is pumped to its destination and the water is filtered out. This abrasive service can be a challenge to the valves in operation. Choosing the right valve for slurry lines is critical specially for remote areas where repairs can be very difficult.

Slurry Lines Valve Specification: 

Valves for slurry applications must have special tough coating materials such as Tungsten Carbide Coatings (TCC) in the Ball and Seat area surface. These application technologies will help maximizing the durability and service life of the valve for this severe tough application.   

Contact our specialized sales team so we can review your slurry lines service conditions to be able to engineer the best solution for your application needs

Autoclave:

Autoclave are used in mining and minerals processing to extract metals from refractory ore bodies. A typical process for autoclaves is high-pressure acid leaching (HPAL), which is often used to extract nickel from laterite ore bodies, but it can also be applied in copper and cobalt production. This high temperature and high pressure chemical injection process creates a very tough erosive and corrosive environment that will push the trim components of a valve to the limits. For this reason it is necessary to specify a valve with corrosive resistant materials that can put up with constant erosion as well.

Autoclave Valve Specification: 

Special Metal to Metal ball and seat surface specifications must be defined to be able to withstand these corrosive, erosive and high temperature service conditions.

Contact our specialized sales team so we can review your AUTOCLAVE service conditions to be able to engineer the best solution for your application needs    

Pressure Oxydation (POX):

Pressure Oxidation (POX) is a process used to extract gold, copper, zinc, molybdenum, and uranium from refractory ore bodies. The POX process utilizes elevated temperatures (roughly 230 degrees Celsius), elevated pressures (roughly 35 bar or 510 psi), and oxygen to liberate the minerals from refractory ores. 

The POX process works as follows: ore is mined and crushed to create a fine material. These fines are mixed with water to create a slurry. This slurry is pumped into an autoclave (a giant pressure cooker of sorts) where oxygen is added. The slurry and oxygen then react as they flow through several compartments within the autoclave. The slurry takes approximately 60 minutes to complete the oxidizing process in the autoclave. Upon leaving the high pressure and temperature atmosphere of the autoclave the slurry must be returned to atmospheric conditions. This is accomplished through one or two letdown/flash stages. Once the slurry is at atmospheric conditions it is washed and separated at which point the gold, copper or other minerals can be recovered from the liquid fraction. 

POX Valve Specification: 

Special Metal to Metal ball and seat surface specifications must be defined to be able to withstand these corrosive, erosive and high temperature service conditions.

Contact our specialized sales team so we can review your POX service conditions to be able to engineer the best solution for your application needs    

The temperature in the coke drum ranges from 415°C to 450°C (780°F to 840°F) at pressures from 15 to 90 psi.  A coker or coker unit is an oil refinery processing unit that converts the residual oil from the vacuum distillation column into low molecular weight hydrocarbon gases, naphtha, light and heavy gas oils, and petroleum coke. The process thermally cracks the long chain hydrocarbon molecules in the residual oil feed into shorter chain molecules leaving behind the excess carbon in the form of petroleum coke. 

VALVE ESPECIFICATIONS:

Depending on the Temperature of operation, the body and trim materials can change.

Temperatures up to 600°F: 

• Body: A105N 
• Ball: A105N/F6a/Inconel + HVOF TCC or CCC coating
• Seats: A105/F6a/Inconel+ HVOF TCC or CCC coating
• Stem: A286-Grade 660
• Grafoil seals and packing

Temperatures above 700°F:

• Consult with our Sales Team to review your service conditions so we can build the best possible solution to your severe service valve needs