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ELWOOD HIGH PRESSURE WATER VALVING
Over 50 years design expertise (formerly known as Nordberg, R. D. Wood and Elmes)
First water hydraulic valve manufacturer to supply a full range of valves
utilizing DIN/ISO Cartridge/logic element configuration.
ELWOOD PRODUCT LIST
Packed Spool Directional Control Valves,
4-Way
- flows from 26 to 120 LPM
- pressures to 410 bar
- NFPA D05, ANSI D02, CETOP 5 Mounting
Poppet-Type Directional Control Valves, 2, 3 & 4-way
- high flow, low pressure drop
- space-saving, small footprint
- manifold-mounted, NPT, socket weld or flanged
- flows to 6100 LPM
- built-in flow control
- meter-in or meter-out
- with air pilot actuation or direct solenoid-actuated pilot
- flows from 8 to 3800 LPM
- 415-bar pressure
Proportional Pressure Control Valves, 3-way
- for roll balance/bending, pressure contouring, installations requiring
precision pressure control with fast response
- high flow/fast response
- 415-bar pressure
- electric auto control
Proportional Flow Control Valves
- high response
- pressures to 415 bar
- flows to 1500 LPM
- manifold-mounted, inline & cartridge versions
For descaling, pump bypass and shut-off service
- Pump Bypass Valve
- "Fail-Open" design
- individually sized DIN orifice cartridges
- 9 - 16 major pressure drop areas
- cavitation eliminated with multi-staging
- Unloading Valves
- contaminant-tolerated
- easy, top-down maintenance
- drop-tight sealing
- flow rates to 11,500 LPM
- working pressures to 420-bar
- Header Prefill Valve Assemblies
- keep descaling header and pipelines full of water, minimizing
hydraulic shock
- customized to fit your application
Accumulator Safety Shut-Off Valves
- protects accumulator system by preventing loss of gas, air or nitrogen
ballast
- accidental opening of valve is prevented because of balanced condition
must exist before valve can be opened by pilot pressure
- closes at low fluid level and/or upon rupture of main line
- pressures to 210-bar or 410-bar
- capacities to 19,000 LPM
- ANSI Standard flanges, others optional
Throttle Valves for weighted-accumulators
(Consult Factory)
- non-crash, safety type
- automatically controlled
- reduce maintenance down-time by allowing a central hydraulic system
to maintain its pressure and operating functions while isolating non-functional
valves for quick repair and/or replacement
- single lever-controlled
- for all NFPA D0/CETOP-mounted directional control valves
- bolted separately to manifold for removal of valves without affecting
system operation
- hydraulic fluid does not have to be bled from system
- cylinders can remain under external load without having to be blocked
Inline Stop-Type Hydraulic Valve (Consult
Factory)
- 6" 6K Valve with Hydraulic-Assist
- Directional & Pressure Control Isolation Valves
Check Valves (Consult Factory)
- Pilot-Operated Check
- 83 LPM, 210 & 410-bar
- NFPA D05, ANSI D02, CETOP 5 Mounting
- stainless steel internals, steel body
- Inline Check-Type Hydraulic Valve
- Check Valve, manifold-mounted
- for dependable service under severe, high pressure operating conditions
Cartridge Valves, Directional Control, Pressure Relief/Reducing,
Sequence, Stop, Throttling, Descale, Check
- sizes 16 to 100 ISO 7368/DIN 24342
- 210 - 410-bar working pressure
- flows to 56,000 LPM
- drop-tight sealing
- polymer dynamic seals do not cross ports
- built-in deceleration and shock alleviation
- includes Accumulator and Level Indicator Assembly
- includes Stop & Shut-Off Valves
- includes Accumulator Safety Shut-Off Valve
- includes Accumulator Control System
- includes Pumps & Compressors
- includes Valve Stands & Systems
- includes Descaling Valves
- includes Descaling Headers & Enclosures
- monitors pump loading, as more pumps are loaded, flow rate increases, maintaining a higher level in the accumulator, providing more constant pressure and available fluid
- because it provides continuous level, it reduces the required vessel
size by between 15 and 30% depending on system parameters
- designed to provide all control and safety features required for the
safe and efficient operation of air/gas/nitrogen-ballasted accumulators
- pump loading sequence is controlled for up to 6 pumps
- incorporates discrete level and pressure switches acting directly
in the pump and valve circuits to provide redundant safety
- has microprocessor control to regulate accumulator level by sequencing
loading and unloading of the pumps with relay logic back-up.
- suitable for new or existing installation
- system stores and records:
- operating pressure
- level in percentage
- pump run time
- pump load time
- alarm status
This can be transmitted for permanent storage into a main frame computer
or printed-out if desired.
- internal microprocessor configured to operate all types of continuous
or discrete accumulator level indicators
- capable of providing a command signal to add high pressure gas/air/nitrogen
ballast when required
Billet Descaling Systems
- high pressure water descaling to improve product quality
Hydrostatic Pressure Test System
- customized hydrostatic testing of API grade-welded pipe or other pressure
controls
- compresses water to a predetermined programmable pressure maintaining
it for a programmed duration
- 5100 psi maximum working pressure
- controls to +0 psi/-25 psi
- designed to deliver 20 gpm of untreated water
- stored recipe capability
Microprocessor-based Pump Control
Unit in Explosion-Proof Enclosure
- for pump loading and staging control for potentially explosive atmospheres
- reduces peak power demands and extends pump life by eliminating unnecessary
and inefficient short duration pump loading
- maintains desired operating pressure range
- enables the system to be operated within a reduced pressure band...for
example, within 10% of the maximum system pressure
- provides for alternating pump loading, distributing pump wear
Decoking Control Valves
- directs high pressure water to cutting nozzles during delayed coking
process in petroleum refineries
- motor-driven, electro-mechanically synchronized
- cam-controlled spindle lift
- operating pressure ranges to 415-bar
- flow capacities to 7500 LPM
- easily accessible enclosed cam and gear train
- integral pressure breakdown orifice
- drop-tight seat design
Microprocessor Precision Pressure Control System
- will accurately control hydraulic pressure to +/- 1 psi absolute with
repeatability
- precise control of hydraulic pressure 500 - 6000 psi
- 1 to 20 gpm
- designed for hydraulic systems where the pressure must be maintained
accurately for long periods of time such as curing presses, synthetic
diamond presses, etc.
Analog Valve Controller
Servo/Proportional
- Analog, high response, linear current output controller
- complete with power supply
- no programming, potentiometer set, switchable, integral, differential & proportional
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