Geothermal Valves

Goshh! I will use somekind of stainless steel valves there and some bellows (Expansion-Contraction) protectors as needs to avoid any erosion damage to pipes down there. Basically. But for the manufacturer you'll may check it out at internet and so on until you get two or three quotations. Depending on budget limits absolutly.

Also considering filtering protection system in order to avoid any scale builds-up on lines etc. Allset have fun and enjoy task at hand. Good Project!

Full-Throttle Now,

MC

supply special valves for geothermal power plant. All valves have specification on maximum operating pressure and temperture for application - don't they? geothermal or whatever?

Check out the people that supply valves for boilers. A globe valve would be what your looking for, as it is least resist to erosion. Far better than a gate valve for this application. The valve can also be use to throttle the steam coming out of the ground.

Bidding to supply material for projects that you have no experience in is a good way to get a bad name for a company.

On the other hand it is a good way to learn if you preparing a bid.

Find out who has been supplying Geothermal valves to other projects.

Then look at the specs of their equipment.

GEOTHERMAL WITH ALL ITS PROBLEMS WILL TEST THE LIMITS OF ANY THING YOU SUPPLY YOUR CUSTOMER.

As far as i study on geothermal valves, they are called as Hydronic valves. have you got any info regarding hydronic valves?

Is there any relation between hydronic valves and geothermal valves?

By the way, we r looking for both isolation and control valves.

Take a business trip to Iceland. Have your company pay for it.

Go during the Summer_Solstice.

Arrange a visit to one of their many geothermal instillations. Take notes.

Can you give a little more info about the application. My understanding of geothermal is glycol circulating underground through tubing supplying 45 to 65 deg f fluid to water source heat pumps. Is this the application? Are you looking for Isolation valves manually operated, or control valve with operators, electric or pneumatic to control flow?

Welcome to Process Engineering.

Has the end user some maintenance standards that will narrow the choice?

An end user doesn't want stuff that is unfamiliar - it's a recipe for increased levels of spare part storage, costing capital unneccessarily, and some equipment may have issues that the end user has tackled before that will obviate its future use at that plant.

Go back to the end user's tender documents and establish the process conditions under which these valves will operate:

• Fluid?
• Temperature?
• Pressure?
• Line size and specification?
• Actuation method?
• Constraints?

Is there a PFD, P&ID and GA drawings for the proposed installation yet? Many of the things needed to specify a valve will be found there.

Consulting Process Engineers can be hired, particularly in these troubling economic times...

PLS find process data below,

1. Application:

300 Bar

120 Deg C

Gate Valve

Rising Stem

2" - 3"

Fluid: 10%sand, 6%bentoit, rest water

2. Application:

50 Bar

200 Deg C

Gate Valve

Rising Stem

10" - 12"

Fluid: steam or hot water

Waiting your replies

Hello HEKTO,

Your second application is quite common, so any gate valve manufacturer can supply valves for that service. If it have to be remotely actuated, for gate valves, that size and pressure I will recommend you a motor operator. Take care if valve need to be torque closed and it must operate at ambient and design conditions. A valve of this type tightly closed in cold condition, after heating by the fluid in contact with one disc side may expand the disc creating which is known as "Thermal binding" and if the stem expands in length, may damage the upper load bearing device unless the stem nut is not rigid but spring supported (Belleville type spring)

As the combination temperature/pressure is not too high, and the fluid just water/steam, you may use just a carbon steel (material group 1.1 according to ANSI B16.34) such as ASTM A216 WCB and a valve Class 600.

For the first application, as the pressure is rather high you'll need to choose at least a Class 2500 valve.

The problem is that in this case isn't just water, it includes a 16% of potentially abrasive material suspended and plain carbon steel will surely last short time. You'll need a abrasion resistant material and not all manufacturers can supply it. If I find a specific manufacturer I will tell you.

Kind regards