Industrial Valve Repair

  • Industrial Valve Services
  • Shop and Mobile inspection, testing, and repair of all types and sizes of valves in accordance with ANSI, API, ASME and customer specifications
  • Production & Pipeline Valve Maintenance
  • Gate, globe, ball valve inspection, testing, and repair
  • In place valve lubrication
  • Valve leak sealing products
  • 24 Hour Repair Services to support Maintenance Outage Requirements

Valve Repair Shop

  • Gate, Ball, Check, and Hydraulic Control Valves
  • Valve tear down and assembly
  • Greasing
  • Testing
  • Machining
  • Paint and prep

BOP Repair Shop

  • Inspection
  • Tear down and assembly
  • Welding and Machining
  • Stress Relief
  • Testing and Drifting

Hydrostatic Testing

Pathfinder performs hydrostatic testing by pressurizing vessels such as pipelines and gas cylinders, to both verify integrity and detect leaks. These tests involve filling the vessel or pipeline system with a liquid, usually water, which may be dyed to aid in visual leak detection. The vessel is then pressurized to a specific test pressure and monitored for any pressure loss. The location of a leak can be visually identified more easily if the test liquid contains a colorant. Overall vessel integrity is typically determined by measuring permanent deformation of the container.

Hydrostatic testing is the most common method employed for testing pipes and pressure vessels. These tests help maintain safety standards and ensure the integrity of a vessel or pipeline system over time. Testing of pressure vessels for transport and storage of gases is very important because such containers can explode if they fail under pressure. Pathfinder is capable of shop testing to 70000 Psi and field testing up to 22,000 psi.


There are four principal types of accumulators, the weight loaded piston type, diaphragm (or bladder) type, spring type and the hydro pneumatic piston type. The weight loaded piston type was used first but is much larger and heavier for its capacity than modern piston and bladder types. Both the weighted type and mechanical spring type are very seldom used today. The hydro-pneumatic piston types use a gas form to act as a spring cushion in conjunction with hydraulic fluid, the gas and fluid being separated by a thin diaphragm or a piston.

A hydraulic accumulator is a device in which potential energy is stored in the form of a compressed gas or spring, or by a raised weight to be used to exert a force against a relatively incompressible fluid. They are used in fluid power systems to accumulate energy and to smooth out pulsations. Much as an air dome is used on pulsating piston or rotary pumps. They will cushion hydraulic hammer, reducing shocks caused by rapid operation or sudden starting and stopping of power cylinders in a hydraulic circuit.

A hydraulic system utilizing an accumulator can use a smaller fluid pump since the accumulator stores energy from the pump during low demand periods. This energy is available for instantaneous use, released upon demand at a rate many times greater than could be supplied by the pump alone.

Accumulators can also act as surge or pulsation absorbers, Pathfinder specializes in performing functional tests, repairs and/or replaces 4-way valves, chokes, and relief valves, as well as bladder recharge/replacement.

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