Tractor Engineers Limited. (TENGL) is engaged in the manufacturing of Oil Field Products for earthdrilling and mining industries. A comprehensive quality assurance program covers every phase of manufacture from raw material inspection to final shipment.

Tough Applications. Tougher Solutions.

Fluid end expendables make a decisive contribution to drilling efficiency. They can make or break production schedules and inhibit or enhance profitability. The recent advent of high pressure and high-speed triplex mud pumps make increasingly greater demands on fluid end expendables. That is why drillers around are asking for supreme standard of quality from replacement pump parts. TENGL's Fluid End Pump Parts are an answer to their needs.

Supreme Sleeved Liner.

Conventional liners have a decreasing hardness gradient from the bore. TENGL on the other hand, offers a bimetallic supreme sleeved liner. It is an assembly of liner shell with liner sleeve. The liner shell is centrifugally cast and heat treated to withstand Hoop Stress generated in shrink fitting and stress reversal during operation.

Construction: The liner sleeve is of high chromium alloyed martensitic white iron and thin walled seamless tube. Special heat treatment ensures proper carbide grain formation, refined microstructure and controlled grain size. Liner sleeves therefore offer maximum wear & corrosion resistance - and reduces frequency of liner changes. The TENGL liner is manufactured to tolerances higher than API specifications. The result is perfect fit between :

• Pump bore and liner outside diameter.
• Liner bore and piston outside diameter.

Liner Packing & Gaskets. Liner packing of substandard material or design will cause Scrubbing : Lateral movement of liner packing when piston reverses the stroke, causing wear of liner or pump body. Wedging : Extrusion of liner packing under the liner, making liner removal difficult. Bottlenecking - Crushing of thin walled liner due to excessive tightening of liner packing causing early piston and liner failure.

Liner packing is supplied free with every Supreme Sleeved Liner. TENGL also provides supreme quality valve cap and cylinder gaskets for effective sealing.

Supreme Valve Assembly.

Valve assembly consists of valve body, valve insert and knock-on plate.

The heavy strong integral driving lugs on knock-on plate nut ensure easy assembly and disassembly when changing the valve insert.

The lower valve stem with flat end facilitates holding in the vice for insert replacement without damaging the guide area. The face as well as diameter of the valve body is threaded. This facilitates replacement of insert.

Selectively hardened lower flange face of valve seat transmits severity of impact to flat cross arms of seat instead of tapered sealing surface.

Valve Insert.

Valve Inserts are available in Nitrile and Polyurethane material. Valve Insert is secured to the valve body by a strong knock-on plate nut, which minimises the entry of solids such as circulation material under the insert, and between the valve striking surface and insert.

Valve insert has a reversible design. This extends service life significantly.

During closing, the resilient valve insert makes first contact with the bevel on the seat and absorbs shock

Valve Seats. Valve seat has precisely ground tapered outside diameter, which is perfectly matched with pump deck taper to provide metal to metal seal between high pressure and low pressure.

Rigid design of four cross arms acts as a guide to valve stem. It increases metal to metal contact between valve body and seat for distributing the impact forces over a large area.

Wear groove at junction of bevel sealing surface and flat cross arms indicates limit of permissible wear.

TENGL also offers quick and easy tools for extraction of valve seat pulling either manually or hydraulically. Valve seat pullers are supplied with four hook 'J' tool puller head suitable for supreme valve seat.

Valve Springs.

Valve springs are specially designed to ensure knock-free pump operation and high pump efficiency. Smooth opening and closing of valve permits complete filling of the pump, avoids excessive surging and prevents knocking. Springs provide correct load on the valve in both open and closed condition.

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