Choke Valves

Multistage

Product description: Bob Energy Provide chokes with Multistage trims for ‘Special’ Applications such as water dumping (Anti Cavitation) and High Pressure gas production. Trim options include:- ED Tortuous path disk st
INQUIRY

Bob Energy Provide chokes with Multistage trims for ‘Special’ Applications such as water dumping (Anti Cavitation) and High Pressure gas production.
Trim options include:-
ED Tortuous path disk stack
ZZ Tortuous path cylindrical low Cv anticavitation trim
CC Concentric Cage type trim

Control Choke Valve, Plug and Cage Choke, External Sleeve Choke, Multistage Choke, Oil and Gas Choke Valve, Severe Service Choke, Severe Service Control Valve, Gas Lift Choke, Anticavitation Valve, Dump Valve, Water Injection Choke, UK, United Kingdom

ED Trim

Model ED choke is designed as a robust control choke with multistage ‘Energy Dissipating’ disk stack trim specifically for applications to avoid cavitation (ie water dumping) and for high energy dissipation such as in high pressure gas production and low noise service.

Several mechanisms are utilized in the design to assist with the conversion of potential energy (pressure) into heat without problems of cavitation in liquids caused by low pressure and the problems of high noise levels with gasses caused by high velocities.
Splitting the flow into a large number of small streams reduces the energy levels in each stream.

Large trim surface area maximizes friction against the fluid.

Large number of changes of direction.
Repeated compression and expansion.
The disk stack has a multiple set of tortuous paths in parallel to each other with each pathway being a series of restrictions in series with each other.
Along each pathway there are restrictions and expansion chambers. In liquid applications the expansion chambers cause swirling of the fluid increasing the number of turns – each chamber is equivalent to approximately 3 turns.

The disks are clamped in position by means of the bonnet bolting. This ensures the stack can be easily extracted and separated for cleaning if it should become necessary.

Trim options include Linear Flow Characteristic, Bi-linear and Tri-linear.

	ED trims are custom designed and manufactured to provide application solutions
	Plug and Cage, External Sleeve, Positive and Special ED Labyrinth trims are interchangeable in a standard valve body
	Accurate ‘micrometer’ style position indicator (manual valves)
	Linear non-rotating stem movement optimizes stem packing life
	Blow out proof stem
	Bolted bonnet with metal to metal bonnet seal provides long life and reliable sealing
	Cartridge style trim installation uses no internal threads or special tools - easing field maintenance
	Pressure balancing (in larger sizes/higher pressures) reduces operating torque
	Range of actuators and mounting kits for ease of automation
	Body materials from Carbon Steel, Stainless Steels, Duplex Stainless Steels and Corrosion Resistant Alloys
	Pressure ratings include API 5000, 10,000 and ANSI pressure classes up to and including 2500# and 4500#
	In-Line (Globe) type body available
	ED chokes available in ‘Over Plug’ flow direction or ‘Under Plug’ for clean gas