The CTST range of bolt tensioning tools are some of the most compact and reliable tensioners available today. below are special features that are incorperated in their design.

Seal Reliability

Seal reliability is a fundamental requirement. All tensioners have polyurethane self-energising lip seal requiring no adjustment. The seals 'snap fit' into the piston housing, remain firm and will not dislodge to cause failure after prolonged use. As the seals are machined and not moulded, size is not restricted, allowing no compromise in tensioner design. The TENTEC seal exhibits a much lower coefficient of friction than nitrile seals used in many other hydraulic bolt tensioners. This benefit, in conjunction with a special anti-extrusion device, allows the tool piston/ram to be returned to its closed position with minimal effort.

Piston 'over stroke' for safety

When using hydraulic bolt tensioners, it is important that the maximum movement of the ram piston is not exceeded. In the unfortunate situation when stroke is exceeded, a simple failure mechanism inside most TENTEC tensioners directs any escaping fluid away from the operator and deposits it inside the device. A red warning indicator line becomes visible as the maximum piston extension position is reached.

Link Hose System

One of the many advantages of hydraulic bolt tensioning, is the ability to link a number of tensioners together and load simultaneously all the bolts on a joint. Although this gives excellent load distribution, an enormous variety of flexible hose assemblies are necessary - which confuse the user. To overcome this problem TENTEC offer a single assembly called a 'Link hose'. This length of flexible high pressure hose, fitted with male and female quick connect couplings at opposite ends is fast and an economical method of connecting multiple tensioners together - the number of hoses required is the same as the number of tools to be linked - a simple formula to remember.

protective coating for longer life

Expensive hydraulic bolt tensioning tools have a long working life. Unlike most manufacturers who supply tensioners in the 'as machined' condition, TENTEC bolt tensioners have a strong and durable PFTE 1270 coating for corrosion and extended life.

quality assured

Throughout the total design concept, stress analysis and 3-D space envelope examination ensure precise application criteria are met. Parametric systems and multi-tasking networking enable detailed design drawing to be turned round in less than 48 hours. An accurate customer quotation is made available in no time at all.

product testing and quality control

All TENTEC products are assembled and subjected to rigorous testing and quality control at the Birmingham site. Tensioner components have to meet exacting standards of manufacture and finished products have to satisfy customer requirements. On-site facilities include high pressure cyclic test equipment to simulate many years of tensioner use and ultrasonic measuring equipment which accurately verifies initial and residual bolt loadings. Calibrated thread gauges are used to ensure compatibility with application thread forms.

test certificate and operating manuals

Prior to despatch all TENTEC equipment is issued with full certification relating to all test procedures that have been undertaken at the factory. Full operating manuals are supplied with simple step by step instructions of tensioning procedures. The technical specification includes the maximum rated pressure for the system. To avoid on-site calculation, performance graphs and charts are supplied.

Service and Training

The supply of a quality product is complemented with on-site customer service, equipment hire and training. TENTEC engineers (fully RGIT certified for offshore work) are available to offer customers thorough operating instruction and to give structured training lectures to tensioner users. There is also a full hire service whereby the TENTEC site service technicians will survey a customer's site to evaluate work and equipment required for a particular project. Part of the service includes the hire of the torque wrenches, and of ultrasonic bolt load measuring equipment. Whatever the problem, consultancy advice and operator training will ensure that the appropriate product and system installation meets full customer approval.