Features

• Compact, multi-spring design.
• Hysteresis is less than 0.8% of full stroke with positioner.
• Linearity is less than 1.5% of full stroke with positioner.
• Stainless steel stems are standard for maximum performance in corrosive environments

Features

• Rolling diaphragm provides excellent sensitivity and provides maximum constant effective area, which translates into improved linearity
• Modular construction provides maximum part interchangeability between direct and reverse-acting models and between selected case sizes
• High spring rates improve control valve stability
• Minimal guiding assures low hysteresis in reverse-acting models ‒ zero hysteresis in direct-acting models
• Stainless steel stems are standard for maximum performance in corrosive environments

Features

• Low conduction through the neck extension and the valve stem makes the valve ideally suited for super-cooled environments
• Extended body neck design allows removal of the seat ring and plug without disturbing the cold box purge, vacuum, or insulation
• No gasketed joints inside the cold box or line insulation, eliminating potential leak paths
• Standard seat ring tools are available for removing trim
• Standard plug design provides metal seat and Class IV shut-off (proper actuator selection allow for Class V shut-off capability)
• A soft seat plug design is available for Class VI leakage
• Preferred mounting is 15 to 90 degrees from horizontal
• The optional Ice-Breaker packing box and/or live-loaded packing are available to minimize ice formation on the valve stem and coupling
• Mounting plate for cold box installation is offered as an accessory

Features

• Expanded inlet and body reduces fluid velocity by 50% as the fluid turns to enter the valve port
• Substantially decreases the erosive effects of turbulence and impingement
• Large-diameter stem handles high seating forces
• Heavy-duty guiding designed to take full pressure drop without stem vibration or breakage
• Extra heavy construction exceeds ANSI standards
• Venturi seat expansion reduces exit velocity; retained by outlet flange for ease of replacement
• “Spring-out” action of the seat ring provides tight shut-off, eliminating wire drawing

Features

• Heavy top- and bottom-guiding assures stable accurate control
• Reversible body structure allows “push down to close” or “push down to open” assembly using the same parts
• Contoured trim reduces the effects of hydraulic side loads on the valve trim
• “Semi-balanced” design requires smaller actuator packages than single-seated valves
• Full flow design provides approximately 40% more Cv than comparable single-seated valves
• Body gaskets are fully captured and protected from the process medium
• Optional live-loaded packing

Features

• Globe bodies for in-line service; angle bodies for difficult service
• Balanced plugs for use with smaller more economical actuators; unbalanced plugs for simplicity of design, fewer parts, and ease of maintenance
• Standard linear or equal percentage characterized ported cages
• Optional Flash Flo, Q-Cage and VeCTor Velocity Control Trims for difficult applications
• Maximum parts interchangeability and simplicity of design for lower maintenance costs
• All standard cages for a given valve size have constant bore diameters requiring fewer part replacements (1 1/2″ – 8″ sizes)
• Cv reductions are achieved by reducing the area of the cage openings, not by changing its diameter or valve travel, thus eliminating the need for changing actuators

Features

• Cage-retained “quick change” seat ring simplifies maintenance
• Metal seats for a variety of services and ANSI Class IV and V shutoff
• Soft seat inserts provide ANSI Class VI shutoff
• Choice of 17-4PH or 316 stainless steel trim is standard
• A wide range of trim sizes is available; up to seven (7) reductions on some sizes
• Bellows seal bonnet is available for difficult or hazardous chemical applications
• Optional live-loaded PTFE and graphite packing

Features

• All metal construction (no elastomeric gaskets)
• Ideal design for applications that require high alloy trims
• Bellows seal bonnets are available for difficult or hazardous chemical applications
• Ultra-low temperature extension bonnets are available for services down to –320°F (–196°C)
• Metal seats for Class IV and V
• Soft seat inserts provide ANSI Class VI shutoff
• A wide range of trim sizes are available; up to seven (7) trim reductions on some sizes
• Low flow “spline trim” is available with very low rated Cv’s
• Optional live-loaded PTFE and graphite packing

Features

• Balanced plugs for use with smaller more economical actuators
• Flash-Flo cages offer an economical solution for low pressure choked liquid and gas applications
• Q-Cage™ and Q-Cage™ Level 2 provide additional noise reduction and cavitation protection for moderately demanding applications
• VeCTor™ Velocity Control Trim eliminates the damaging effects of noise and erosion typically associated with severe service applications
• Optional live-loaded PTFE and graphite packing
• Standard metal seats offer Class IV shut-off when used with the standard PTFE piston seals
• Soft seat inserts simplify maintenance and offer Class VI shut-off when combined with the optional spring loaded PTFE cup seal
• Standard balanced plug accepts metal and carbon graphite seals for services that exceed the PTFE cup seal’s capabilities
• Unbalanced plugs offer tight shutoff for higher temperature and/or pressure

Features

• Electraulic Power Module Motor & Pump System
• Closed-Loop Hydraulics
• No Routine Fluid Maintenance
• Pressure Gauges To Monitor Output
• 100% Duty Cycle Motors
• Low Power Consumption
• User-Friendly Push Button Calibration
• Rack & Pinion Cylinder Design
• 90- & 120-Degree Rotation

Features

• Electraulic Power Module Motor & Pump System
• Closed-Loop Hydraulics
• No Routine Fluid Maintenance
• Pressure Gauges To Monitor Output
• 100% Duty Cycle Motors
• Low Power Consumption
• User-Friendly Push Button Calibration
• Rack & Pinion Cylinder Design
• 90 Degree Rotation

Features

• Electraulic Power Module Motor & Pump System
• Closed-Loop Hydraulics
• No Routine Fluid Maintenance
• Pressure Gauges To Monitor Output
• 100% Duty Cycle Motors
• Low Power Consumption
• User-Friendly Push Button Calibration

Features

• 1-X-210 Series pneumatic diaphragm actuators are designed to operate control valves for both throttling and on-off service.
• The thrust is provided by a rubber, air-loaded diaphragm, and in the opposite direction by a helical spring.

Features

• The new series geometry is moulded by demanding experimental tests campaign supported by CFD and FEM analyses.
• Experimental tests, both on compressible (air) and incompressible (water) fluids, with and without back pressure, were performed according to PED requirements (standard ISO 4126-1 and working draft ISO 4126-11).
• With respect to previous series VSU 3-5402, the new series still provides high quality overpressure protection with the same valve on gas, steam, vapour, liquid and two-phase mixtures services and, in addition, offers dramatic improvement of discharge flow rates under back pressure conditions.

Features

1-6330 series THECO are suitable for ON-OFF service in low potentiality processes but under continuous and severe conditions where maintenance must be minimized.

These valves are used in tyre, food industry, plastic forming etc.

• Size: 1/2″ to 1.1/2″, connections: screwed and flanged ends.
• Available two- and three-way style.

Features

Three-way control valves, Parcol 1-6113 series and 1-8113 series are three-way control valves.

1-6113 series control valves are used for mixing service, whereas 1-8113 series for diverting service.

• Body materials: carbon steel, CrMo and stainless steel (316, 316L).
• Sizes available from 1″ upto 12″

Features

Features

Features

1-4442 series Spraysat multiple nozzle desuperheaters (variable area) are designed to provide optimum performances and high rangeability.

• The independent spray nozzles progressively activated by the throttling piston, provide a good water atomization down to minimum flow conditions.
• To improve the quality of atomization and accuracy of temperature control, several sizes of spray nozzles are available.
• The built-in control system is very compact, reliable and easy to operate.
• The split body design allows to change easily the orientation of water connection versus the steam piping and greatly facilitate the seat replacement.

Features

Features

The new series VSU 3-5403 universal pressure safety relief valves represents the third step in evolution of the first series 3-5401 dated 1989.

• The new series geometry is moulded by demanding experimental tests campaign supported by CFD and FEM analyses.
• Experimental tests, both on compressible (air) and incompressible (water) fluids, with and without back pressure, were performed according to PED requirements (standard ISO 4126-1 and working draft ISO 4126-11).
• With respect to previous series VSU 3-5402, the new series still provides high quality overpressure protection with the same valve on gas, steam, vapour, liquid and two-phase mixtures services and, in addition, offers dramatic improvement of discharge flow rates under back pressure conditions.

Features

1-6942 globe control valves are designed and manufactured specifically for the medium and low pressure sections of Urea Plants.

• Available either in straight way or angle execution, this control valve series is provided with integral plug and stem and special guide bushing in order to avoid any dead zones inside the valve.

Features

1-4800 angle, split body control valves are designed and manufactured so as to grant good service and longer trouble free life with very reduced maintenance.
The original and simple design of PARCOL valves as well as the right selection of the part materials result in great success of the same.

• Materials are adequate for urea and carbamate fluids and comply with the material specifications for this service of main Licensors such as Snamprogetti, Stamicarbon, Urea Casale and others.
• Connections are obtained directly on the single piece that constitutes the valve body in order to keep down the weight, whereas the shape of internals does not leave dead zones.
• In fact dead zones are a cause for corrosion since carbamate strengthens its corrosive action particularly in these zones due to the failure of oxygen protection (passivation).

Features

Melamine is a colourless substance, a heterocyclic aromatic compound with nitrogen. Melamine is the starting material for the production of melamine resins which are used as glues and adhesives or are converted to thermosets.

• Control Valves for this specific service shall be able to deal with highly corrosive, high pressure cristallizing fluid.
• 1-4500 series is featured with a special body design for a smooth flow pattern, absence of bonnet and gaskets, and integral jacketing with thermal oil for body and flanges.

Features

1-2311 and 1-2611 High Pressure butterfly control valves have one-piece body and disc obtained from forged block of specialty stainless steel and special packing design to warrant maximum reliability.

• Trim materials have been selected by testing on various urea plants for many years to ensure maximum reliabilty and performance.
• 1-2311 is privided with swing through design, while 1-2611 is the double eccentric design.

Features

• Primarily designed for power plant installations, the valves are used for critical services such as high-pressure steam line drain, continuous blowdown, line warm-up, cooling water stop, or control for desuperheating systems.
• The linear or angle type drop-forged steel body with a unique bonnet design ensures strong, compact, and reliable construction.
• The special trim design with an intermediate cage-guided double plug separates sealing surfaces from modulating ones, ensuring, through appropriate material selection, perfect and dependable sealing.
• A broad range of multi-step trim combinations makes the valve suitable for modulating and on/off services involving extremely high-pressure drops where reliable sealing is required.
• For applications involving erosion and cavitation, single or multiple concentric cages with special drilling are available.
• The 1-7000 valves are typically equipped with single or double diaphragm multi-spring pneumatic actuators, with electric or hydraulic actuators available upon request.

Features

4-4000 Ball Control Valves series is tailored design to suit any application where high CV, high rangeability and seat tightness are required for the specific service.

• The 4-4000 Series features a trim variety that provides effective solutions for noise reduction, cavitation, and dirty fluids, and is available in full port, V-port, drilled disc, perforated plates, drilled wings, and Limiphon configurations.

Features

The 1-2480 series PARCOL flanged control valves have a double eccentric disc which reduces torque requirements and seal ring wear by minimizing its contact with the disc.

• Additional torque reduction is obtained by the profiled drilled integral wings of the design 1-2483.
• The drilled wings of 1-2483 make the valve suitable for flow control in cavitating services on liquids and for low noise flow control on compressible fluids.
• Due to the eccentric design of the disc, these valves can provide a stable flow control with limited negative gradients and excellent shut-off in closed position.
• Also the flow characteristic is improved and it is close to an equal percentage shape for low openings.
• The reduction of flow coefficients due to the wings is balanced by higher values of factors FL, xT and xFZ which allow the use of this valves for high pressure drop and angular travel up to 80° on liquid and gas services.
• For more critical service a special execution with extended wings and angular travel up to 100° is available.
• Available with body in A216 WCB, AISI 316, AISI 316L, A890 4A duplex stainless steel and size upto 80 inches is widely used in desalination plants.

Features

Features

Features

1-9000 series Limiphon valves are widely used in steam pressure reduction and desuperheating stations, quite frequent in turbine by-pass lines.

As a matter of fact:

1. The pressure reduction takes place through paths whose section changes with the flow rate, thus granting the fluid velocity control in any operation condition
2. The fluid velocity control allows to limit the noise generated by the valve and grants the absence of vibrations and trim wear
3. The Limiphon trim has no construction limits as far as number of stages (so called “lunettes”, due to their particular shape) and expansion of flow paths section are concerned. Therefore there are no practical limits for Δp and p1/p2 ratio as required by the process.
4. Limiphon valves may be sized in order to generate noise pressure levels comparable to the ones caused by the fluid flowing inside the piping. In this case they could not be essential for predicting the noise level produced by the whole line.
5. Unlike the valves provided with fixed section silencer installed downstream, Limiphon valves are the technically ideal solution for the above process, as well as for all applications where a strong pressure reduction takes place and regular vibration-free operation, maximum noise reduction under significant load changes are required.

Features

Parcol 1-5700 Pressure Reducing and Desuperheating stations (PRDS) represent the most universal and compact solution for pressure reduction and desuperheating service of steam turbine by-pass lines, discharging both to intermediate or low pressure sections of power stations.

• The spherical body shape design, together with the high quality of construction materials, allow a more uniform wall thickness than the conventional ones, fabricated by welding bodies, reducing P/T fatigue effects and improving welded joints quality.
• The pressure reduction is mainly achieved through two stages: the first stage has the function to adjust the flow rate by means of a drilled cage trim, the second stage, designed with fixed throttling section, has the double function to generate a backpressure on the first stage by reducing fluid velocity and generated sound pressure level, and to convey the steam towards the injection chamber, at speed and distribution suitable to optimize the desuperheating process.
• The desuperheating section, put immediately downstream the second stage, consists of the injection chamber complete with injection nozzles or a different Parcol desuperheater.

Features

PARCOL 1-44MC Series Multistep Cascade Control Valves are the best solution for severe services with high pressure, dirt, cavitating and erosive liquid flow.

• The peculiar trim is constituted by several plug sections, working in cascade with increasing passage areas to guarantee excellent anti-cavitation performances.
• A number of stages with different area ratios are available to cover different process conditions.
• Furthermore, the trim can be customized to fully accomplish particular requirements.
• The seat can provide Class VI leakage according to IEC 60534-4 and ANSI/FCI 70-2.
• Large passage sections permit to process also liquids with large particles without damaging and plugging.
• Easy quick changing of the trim is possible thanks to the top-entry design, which guarantee full access to the valve interior without removing valve from the pipe.

Features

Features

• Main features are a radial section expansion designed both to minimize the pressure drop at last stage (the most sensitive to cavitation) and, at the same time, to limit the pressure drop at first stage.
• Less stages from bottom to top of the stack, resulting in an increase of the incremental Cv along the travel.
• Capability to comply with the pressure drop decrease at high flow rates, usually occurring in boiler feed water applications.
• The plug end close to the seating surface is labyrinth-shaped (CCF design) to provide the best pressure distribution in the clearance flow passage between plug and cage.
• This to prevent damage at the seat and on guiding surfaces.
• All the above features make VARISTEP the ideal solution for start-up and main feedwater combined control valves.

Features

Based on the concept of multi-path and multi-stage labyrinths (velocity controlled trim), LIMIPHON trim divides flow into many streams to minimize the energy levels and it is the ideal solution for all those applications where high pressure drops are the main cause of noise, cavitation, vibrations and erosions.
Typical services where LIMIPHON valves are indicated :

• Compressor recycle (antisurge )
• Blowdown to vent or flare
• Natural gas pressure reducing stations (anti-icing effect)
• Steam turbine by-pass stations
• Feedpump recirculation
• Feedwater start-up (see also Parcol VARISTEP valve)
• Pump test loops
• Superheater/reheater attemperator spray
• Deaerator level control

Features

• VeGA is a straight body single seat control valve with cage guided balanced plug designed to withstand the most severe process conditions.
• The special plug design allows improving valve rangeability by reducing minimum controllable flow and plug erosion.
• The high-pressure recovery factor value compared with conventional contoured plug control valves ensure higher flow rates on compressible fluid service and reduces cavitation risk and effects on liquid service.
• All versions have quick change trim.
• Together with the standard high-capacity trim, low noise trims and double cage trims are available respectively for critical service on compressible fluids (gas and vapor) and for high differential pressures or for cavitating service where higher pressure recovery factor values are required.
• Balanced Plug with Pilot execution allows to comply with IEC sealing class V up to 566°C for compressible fluids service.
• “Flow to close” configuration improves seat ring protection and increases seating force making this solution particularly reliable.
• Contoured unbalanced plugs are available for dirty fluids service.
• A special material configuration is available to comply with NACE MR0175 and MR0103 standards.
• VeGA control valves are usually equipped with Parcol diaphragm spring return pneumatic actuators 1-X-210 and 1-X-250 series (pneumatic cylinders 1-X-400 series for DN 16″ and over).
• Electrical or hydraulic actuators are also available on request.
• Angle body version 1-4640 series is available on request

Features

Features

Features

Features

• Robust construction for long-life performance
• Compact, lightweight design
• Available in epoxy-painted aluminium or stainless steel
• Easily adjustable
• Mounting bracket supplied as standard
• Connector – 1/4” NPT

Specifications

Series 1000

Series 3000