Crane Flow Of Fluids

[Eugene Hill]

For75 years there has been one publication in the fluid handling industry that virtually every engineering professional and student is familiar with, and that is the TP-410, This publication has been a valuable educational resource in the flow of fluids through valves, pipes and fittings for generations and we are incredibly proud of the contribution it has made to our industry. Furthermore, Crane is delighted to share the new TP410 updates this year, and we are hoping that the new edition will prove to be both beneficial and appreciated by the engineering and valve communities worldwide.

CRANE CP&E designs and manufactures a variety of high performance products including: highly engineered check valves, sleeved plug valves,lined valves, process ball valves, high performance butterfly valves, bellows sealed globe valves, aseptic and industrial diaphragm valves, multi/quarter-turn valves, actuation, sight glasses, lined pipe, fittings and hoses, and air operated diaphragm and peristaltic pumps. Its trusted brands are in use worldwide in many industries, including Oil & Gas, Oil Refining, Petrochemical, Power Generation, Chemical Processing, Biotechnology, and Pharmaceutical.

Barksdale is an ISO 9001 registered manufacturer of controls for industrial applications, specializing in the control and measurement of fluids. Barksdale is also ISO/TS 16949:2009 certified for the automotive industry. As a subsidiary of Crane Co., Stamford, CT, we have the financial resources of a large company, while our size allows individual customer partnerships. Founded in 1949, we are based in Los Angeles, CA, have a manufacturing facility in Reichelsheim, Germany and distributors around the world.

With a standard product line as the base, Barksdale prides itself in supplying specially designed or adapted products to meet customers' specific requirements. A wide range of optional modifications are offered on most of Barksdale's products, allowing you to customize the products to meet your specific application while using standard components. If, however, your requirements go beyond the available modification options, Barksdale's engineers are ready to assist, even if your application requires new technologies. For more than fifty years, customers by the hundreds have turned to Barksdale's engineers for custom designed components. The next time you are faced with a difficult, or even an "impossible" problem, call the Barksdale distributor nearest you.

Throughout the world, Barksdale components can be found in steel mills, on machine tools, in auto plants, in power generation and distribution facilities, in chemical processing plants, in pulp and paper mills, textile mills, amusement parks, and food processing plants, on offshore drilling rigs, in oil and natural gas fields, rescue equipment, and on many forms of transportation equipment, both on- and off-road. Many industries use a variety of Barksdale's product lines. E.g. in mobile- and stationary hydraulic systems: from hydraulic clamping in machine tooling, hydraulic steering systems off highway loaders or load monitoring on crane support struts to vertical cargo lifts and elevators. In almost every industry, Barksdale products are at work, helping to build a better tomorrow.

Crane Building Services & Utilities (Crane BS&U) design and manufacture a range of engineered flow control products and solutions for the HVAC and Utility sectors. The company is part of the Fluid Handling Division of Crane Co a multinational company with net sales in excess of $2.6bn in 2013. Crane BS&U is headquartered in Ipswich UK and has some 600 employees based in UK locations in Ipswich, Hitchin and Northampton as well as overseas in the UAE and China.

The Barnes Pump line includes submersible sump, sewage, effluent and grinder pumps as well as Plumbing and Pressure Sewer Packages for municipal, commercial and residential applications. Deming branded pumps consist of a wide range of products for industrial pre- and post- production water applications. Weinman has provided over a century of commitment to the HVAC and industrial marketplaces. Burks Pumps are primarily used in OEM and light commercial and industrial applications such as packaged boilers, commercial dishwashers and similar applications.

Crane Valve Services is a premier provider of valves and related services for the global nuclear power market. A longtime leader in valve design and production, Crane Valve Services delivers comprehensive solutions and superior performance in valve diagnostics and service. Backed by Crane's heritage of quality and innovation, nuclear power providers rely on Crane Valve Services to ensure plant safety through the reliable performance of safety-related motor-operated, air-operated and check valves.

Crane Supply is Canada's foremost wholesale distributor of pipe, valves and fittings to professionals, who design, install and maintain fluid handling systems. With branches situated in every major Canadian center, Crane Supply's employees are dedicated to making it the "Supply House of Choice" in Canada. Key markets include maintenance, repair and operations (MRO), industrial and commercial mechanical contractors, and OEM. The business is committed to achieving total customer satisfaction through 100% on-time delivery, error-free shipments and exceptional fill rates.

All hydraulic ratings and pressures are at the crane, compressor or outriggers. Pressure drops within the hydraulic system is not taken into account. These pressure drops are added to the rating of the hydraulic pump and components. Auto Crane highly recommends consulting a hydraulic expert for specifying the correct hydraulic pump type and size, oil reservoir size, hydraulic cooler, hydraulic pressure relief, and other hydraulic supply components for your application.

Please take into consideration the following: The hydraulic flow and pressure requirements of the crane and air compressor, the continuous hydraulic load when the crane and compressor are running, the duty cycle and ambient operating temperatures, and any other hydraulic equipment that may share the same hydraulic supply system.

Trucks which are operated with the PTO continuously engaged will build-up more heat than a passive oil tank can dissipate and will require an auxiliary cooler or additional cooling from another component such as the Vanair RS85 compressor. Auto Crane offers a custom Vanair RS85 with a larger cooler which allows 100% duty cycle.

Use a flow capacity nomographic chart such as the one provided by Parker to determine the minimum size hose for pressure, return and suction lines. Click on the image below to see full size chart. Pump suction lines should be in the 2-4 ft/sec range. Return lines should be in the 5-10 ft/sec range. Finally, pressure lines should be in the 10-20 ft/sec range.

The velocity of the fluid should not exceed the range shown in the right hand column. When oil velocities are higher than recommended in the chart, turbulent flow occurs, resulting in loss of pressure and excessive heating.

Many trucks have a hydraulic-driven compressor such as the AC-40, Vanair RC40, VMAC H40 or the Vanair RS85. These compressors have various flow requirements and use cases where the recommended hose sizes are:

International Standardization Organization (ISO) established a viscosity grading (VG) system for industrial hydraulic oils. According to the system hydraulic oils are designated by the letters ISO followed by a number equal to the oil viscosity measured in centistokes at 40C (104F): ISO VG 32, ISO VG 46, etc.

Oil viscosity is rated at 40C (104F) and 100C (212F). At low operating temperatures, high viscosity oils negatively affect the efficiency of the hydraulic system, resulting in reduced system performance, and worse yet, can result in lubricant starvation and cavitation of the pump damaging equipment. For this reason ambient temperature performance must be taken into account when selecting an oil.

Auto Crane uses Superfilm AW 5W20 hydraulic oil with -17C (0F) to 43C (110F) ambient performance with a 82C (180F) max operating temp. This oil is not suited for extreme cold environments since the pour point is 0F. Links to the datasheet and SDS are included below.

ATF is formulated for high viscosity index (the ability to maintain test viscosity over a wide temperature range) and has excellent water control properties allowing the fluid to hold more water in saturation before being released to create corrosion. Also, the additives in ATF are formulated to improve lubricity, anti-foaming, shear stability and resistance to oxidation.

While the NexStar cranes feature a 5 micron pressure filter to help prevent deposits from reaching the proportional valves, you must insure the oil and hydraulic tank and lines must be clean before running the crane for the first time. Failure to do so will result in contamination problems for your customer.

Crane valves regulate the flow of fluids (gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways. Crane offers many types of valves under many well-known brands.

Centerline Valves: A market leader in quarter-turn valves resilient seated butterfly valves for more than 40 years, and a well-earned earned reputation as a supplier of superior valves at competitive prices.

Flowseal Valves: Flowseal High Performance Butterfly Valves are a standard in many industries including heating, ventilating and air conditioning, power generation, hydrocarbon processing, water and waste water treatment, and marine and commercial shipbuilding.

Duo-Chek Valves: Duo-Chek valves have long been the standard for low-pressure drop flow reversal protection. These valves are made from cast iron, cast steel, stainless steel, and a broad variety of exotic materials. Duo-Chek offers retainerless designs to API 594 end-to-end dimensions in steel bodied wafer and lug style with a wide variety of trim materials including both metal and resilient seats. Valves come in sizes up to 88" and pressure ratings up to class 4500.

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