Mining: Mitech Product Range

Linear
Rotary

Bespoke Valve

Bespoke Valves are specially engineered for the application. With installations around the world, our valves have proven to be robust, long lasting and engineered exactly to customers’ requirements. Examples include 600 bar pressure drops on water, 950°C gas and many more. All valves and accessories are available in a choice of materials.

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Rotary

Butterfly Valve

Mitech’s Butterfly valves are concentric disc, rubber lined valves for use in a wide range of applications. Their robust design and variety of materials of construction make them compatible with most liquids and gases in applications where zero leakage shut-off is required. The valves are designed and constructed in accordance with BS-5155 and BS-EN1092-1. They range in sizes from DN80 to DN2000 with pressure ratings from PN10 to PN16. A selection of body, trim and liner materials is available with cast iron bodies and discs and EPDM liners being the standard offering. WCB and Stainless Steel body materials with coated or Stainless Steel discs and Polyurethane liners are also available.

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Rotary

Damper Valve

Mitech’s Dampers are ideally configured for gas control applications where a tight shutoff is not required. They can be made suitable for high pressures and/or temperatures and are much more cost-effective in these applications than Disk valves. Dampers are effectively similar to Butterfly valves except that they are not fitted with Damper to body seals. Dampers are subject to a leak rate not exceeding 1% of their rated flow. Bodies and disks can be manufactured from carbon or stainless steels and shaft seals can be either PTFE or graphite, depending on the operating temperatures. Dampers can be produced in flanged, wafer or lugged pattern and can be designed in single-door, double-door or oblong vane-type configurations. They are available in sizes from 200 mm to 2 500 mm with flange ratings of up to #600. Larger sizes are available upon request.

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Desuperheaters / Attemperators

The Desuperheaters have been designed with the aim of reducing plant maintenance by manufacturing a unit that is easy to install, lightweight, and has no moving parts. All units are designed and manufactured in accordance with ISO 9001 and PED quality approval systems. Both desuperheating and attemporating are processes where water is added to superheated steam to control the temperature to a set value. Engineered for each applicationConventional, Conventional Steam Flow and Steam Atomising designs

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Linear

Dosing Control Valve

Mitech’s locally designed and manufactured Dosing Control Valves are especially designed for each application and are ideally suited for use in ring main dosing systems. The valves monitor the process, reduce reagent costs and eliminate human error. The Dosing Control Valves continuously monitor the dosing state with a 15 minute feedback. The medium is continuously circulated reducing clogging, spillage and crystalisation.

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Linear

Globe Control Valve

Mitech Globe Control valves are general purpose control valves that can be engineered to solve both complex and basic requirements. Their robust construction makes them long-lasting and easy to maintain, while their modular design makes them easy to specify, reducing spares inventory requirements. From standard to severe service½” to 24” NBUp to ANSI 4500Tight shut-off, low noise, cavitation control, energy dissipating trims

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Linear

Plastic In-line Globe Control Valve

The Plastic In-line Valve is effectively a hybrid between the Dosing Valve and the Globe Control Valve. It is actually a standard globe valve utilizing a plastic body similar to the dosing valve, and is also commonly used for dosing applications but where a ring-main has not been set up. Suitable for use with highly erosive mediumsSimple and easy to maintainRobust body with external steel reinforcement to carry flange loadingsSizes range from 25 mm to 150 mmANSI # 150 ratedDouble-acting spring-return actuatorsField reversible fail-closed or fail-open action

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Linear

Pneumatic Linear Actuators

The Linear Actuator is easy to mount, is offered in various sizes and is suitable for use on most linear valve types. Compact in design, it is rated for 1 000 kPa and has an anodised aluminium cylinder and a stainless steel shaft. Larger sizes use a steel cylinder. Pneumatic piston design195 000 NewtonsEngineered and fitted to most valvesAvailable in large sizes

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Rotary

Pneumatic Rotary Actuators

The Rotary Actuator is a low maintenance unit. It is available with either a double crank mechanism for modulating control or a scotch yoke mechanism for on / off duty. The main shaft assembly on the double crank design is welded together and therefore does not have to be assembled / disassembled. The actuator is field reversible from clockwise-to-close to clockwiseto-open and has Namur mounting for switch packs or positioners on the top shaft and transfer case lid. Pneumatic piston designDouble crank, scotch yokeUp to 250 000 Nm torqueEngineered and fitted to most valvesAvailable in large sizes

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Positioners

The range of pneumatic and electro-pneumatic positioners is easy to set up and calibrate. Their modular design makes them versatile and suitable for almost any pneumatic application. They are field reversible and corrosion resistant. Modular designRotary, Linear, Single and Double ActingEx ia as a standard20 - 100 kPa, 4 - 20 mASuitable for up to 10 bar air supply

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Rotary

Rotating Disc Valve

The locally designed and manufactured Rotating Disc Valves feature a unique rotating/shearing disc which provides a self-lapping rotation and enhanced seat cleaning action which cuts through solids giving a long-lasting tight shut-off. The metal-to-metal seating makes the valves abrasion resistant over a wide temperature range. Their high pressure capability, which is better than industry standards, allows the force to be distributed over a larger area resulting in reduced trim wear.

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Linear

Sweep Angle Valves

Mitech’s Sweep Angle Control valve is ideally configured for service with highly erosive liquids where pressures and/or temperatures are too high for pinch valves or similar slurry valves, and also for applications where severe flashing is expected. The plug and seat can be manufactured in hard material (up to and including Tungsten Carbide or other Ceramics) and the body can be boronized or coated with High Velocity Spray Coated Tungsten Carbide in critical areas.

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Rotary

VT Ball Valve

Integral metal seat. With ValvTechnologies’ trademarked HVOF RiTech® coating process, the integral seat in ValvTechnologies’ rotary operating valves are resistant from the attack of abrasive magnetite or ferrous oxides in the steam flow. Body seal ring. ValvTechnologies employs a field proven seal ring technology to ensure sealing under all operating conditions up to 1500°F. The body seal ring is loaded at a pressure higher than 20,000 psi. In addition, valves sized 3” and above contain a secondary grafoil seal to further guarantee reliability. Patented coating process. The sealing surfaces are overlaid with tungsten or chromium carbide using our HVOF RiTech® coating process. These surfaces have a hardness of 68 - 72 Rc to provide uninterrupted operation in the most severe conditions. Live-loaded gland area. The V Series’ sealing design features a four stud, live-loaded assembly designed for heavy industrial applications. The sealing material is high purity Grafoil® surrounded by stainless steel wire mesh anti-extrusion rings. The six Belleville springs (per stud) provide constant load pressure through extreme thermal shocks and prevent wear leaks in high-cycle ser vice. True blow-out proof stem. ValvTechnologies’ design utilizes a one-piece, hard-faced, blow-out proof stem that is inserted through the inside of the body cavity eliminating the possibility of blow-out through the gland area. Absolute zero-leakage. ValvTechnologies tests every valve according to ANSI procedures, however, we toughen the standard and define zero-leakage as no detectable leakage of gas or a liquid for a period of three minutes or greater. The ValvTechnologies’ standard is zero drops and zero bubbles, guaranteed.

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