Is there such a thing? This is an unusual frequency range but I've been asked to provide a system in this range.
Do you know of any manufacturers making radios in this frequency range? Our project is in the Middle East.
We need to run some Cat5 TSP cable through a Class 1 Div 2 area on cable tray. The cable is just passing through the area. The cables enter and the room through sealed conduits.
Can we use plenum rated cable? or do we need to run the cable is treaded conduit throughout the room?
What type of valves are typically used as block valves for crude oil pipelines? The few pipelines I've worked with have rising stem gate valves. we are looking to replace a number of existing gate valves on a line and have found the best pricing is for a ball valve. I'm hesitate to recommend...
Thanks for the reply. We purchased a control valve with an anit-cavition trim. The holes are 0.05". We only found out the size after purchasing and after having problems. No where in the documentation does it indicate filtering or hole size.
We installed a filter with a 16 mesh but still...
Is it practcal to think we can add strainers to keep the control valve clean (and not have to clan the strainer every hour)?
BTW this is purchased crude off a tanker ship. I would think there is some kind of spec for allowable suspended solids and particle size.
I'm working with a control system for a crude oil pipeline and I'm interested in the amount of particles in the oil. We will be recirculating the oil around the pumps thorugh a control valve and therefore will have a high pressure drop (1440 psi discharge, 35 psi suction). Some of the control...
What is the current practice for valves on a metering skid for crude oil, ansi 600, 4"? Gate valves are avialable in API 6D, are less expensive then ball valves, and seem "off the shelve". Am I missing something?
The subject just came up again for my project. We are looking for a means of determining the viscosity of the crude oil in a pipeline. We are interested in the value to compare against the pump curves to possibly make adjustments to the pipeline operation to maximize throughput.
I'm an...
We are designing electrical and control systems for installation in the Amazon and other tropical environments. These are for unmanned stations that will have crude shipping container type buildings housing PLC control panel, telecommunications equipment, batteries for solar power system. We...
Thanks for the detailed reply.
Several vendors responded to our RFQ based on our data sheets and did not seem that concerned with the pressure drop. We stayed with the globe valves that have cavitation control and beleive we have 2 good quotes. The real test will be how they respond in action.
I'm trying to retrofit some old manual Grove gate valves (4" and 8") with some position limit switches. We only require the open and close position and nothing in between. These are manual valves and they do not require an accuator. There is a screw shaft that extends out of the...
I'm looking for vendors of control valves for a recirculation line for a crude oil pump station. The line is 4" and is from the pump discharge (1400 psi) to the pump suction (35 psi). Are some manufactures better for crude oil under these conditions? We are looking at the regular...
I read in a recent Control magazine (April 2003) that it is possible to calculate viscosity of a fluid by using a coriolis flowmeter and differential pressure. Does anyone have experience doing this and is it possible with crude oil?
Thanks in advance.
Joe Malter
