Piping Specialties Inc. (PSI) is one of the northeast's largest suppliers of valves; process controls/instrumentation, and engineered mechanical specialties. Industries served: Power Generation, Pulp/Paper, HVAC, Water/Wastewater, Food/Beverage, Life Sciences, Chemical/ Process, Semiconductor. For more information visit PSI-Team.com or call 800-223-1468.
Basics of Industrial Globe Valves
Exploded view of globe valve (courtesy of Conval) |
Applications of Globe Valves
Globe valves are used in many different industries, but particularly in the petrochemical and power generation industries on fuel oil pipes, chemical feed systems, steam pipes, as well as cooling water and feedwater systems. Other industrial applications of globe valve include boiler, main steam vents, and turbine lube oil systems.
Pros
Globe valves have many advantages that make them preferable over other valve designs. Globe control valves have excellent shut-off and throttling capabilities. In addition, globe valves are easy to maintain and repair compared to other valves.
Cons
Internal view of globe valve (Conval) |
For more information on industrial globe valves, or any type of industrial valve, contact Piping Specialties, Inc. by calling 800-223-1468 or by visiting https://psi-team.com.
Labels:
Connecticut,
Conval,
globe valve,
Maine,
Massachusetts,
New Hampshire,
Rhode Island,
Vermont
MOGAS Critical Service Valves Fire Tested to API 607 and API 6F3
This video explains the MOGAS approach to fire testing their severe service ball valves to API requirements.
- API 607, 7th Ed. Fire Test for Quarter-turn Valves and Valves Equipped with Nonmetallic Seats
- API 6FA, 3rd Ed. Specification for Fire Test for Valves
Piping Specialties, Inc.
800-223-1468
Labels:
Connecticut,
fire testing,
Maine,
Massachusetts,
Mogas,
New Hampshire,
Rhode Island,
severe service,
Vermont
Hyspan Series 1500 Laminated Bellows Expansion Joints
Pipe expansion or contraction resulting from temperature changes is independent of line size; however, the bellows elements of small diameter expansion joints have less ability to absorb motion than larger sizes because of restrictions on the corrugation size. Recognizing these shortcomings, Hyspan® developed Series 1500 Laminated Bellows Expansion Joints for applications that involve axial motion.
Piping Specialties, Inc.
https://psi-team.com
800-223-1468
The bellows elements are designed with up to four individual thicknesses or laminations of precision stainless steel foil. This design procedure combines the high flexibility of thin material while providing the pressure resistance of multiple laminations.
As a comparison, a bellows made from four plies of 0.008" thick material has the same pressure rating as a single thickness of0.016" thick, but the laminated construction will deflect twice as much and requires only one-half the force to compress.
Piping Specialties, Inc.
https://psi-team.com
800-223-1468
The Pratt Industrial TE Series Triple Offset Butterfly Valve
The Triple Offset Butterfly valve has been designed to answer the industries demand for an alternate solution to gate valves and ball valves where weight, space, performance, and the ability to modulate to the process flow were an issue.
Pratt Industrial Triple Offset Butterfly Valves are from the family of quarter-turn valves. This valve is designed and manufactured to meet API 609 and ASME B16.34 specifications.
Applications
Pratt Industrial Triple Offset Butterfly Valves are from the family of quarter-turn valves. This valve is designed and manufactured to meet API 609 and ASME B16.34 specifications.
Applications
- Block/Isolation
- Modulating; manual, pneumatic, or electric motor operators.
- Refinery
- Chemical
- Petrochemical
- Power
- Steam Generation
- Water/Waste Water Treatment
What Are LINK-SEALS?
Why You Should Use LINK-SEALS®:
- Install in up to 75% less time compared to lead-oakum joints, hand-fitted flashings, mastics, or casing boots.
- Designed for use as a permanent seal. Seal elements are specially compounded to resist aging and attack from ozone, sunlight, water, and a wide range of chemicals.
- Rated at 20 psig (40ft of head), which exceeds the performance requirements of most applications.
- NSF 61 and Factory Mutual Fire Approved materials available. Also carry a wide variety of approvals from various Federal agencies, associations, code groups, laboratories, and organizations.
- Standard fasteners have a two-part zinc dichromate and proprietary corrosion inhibiting coating. Corrosion resistant 316 stainless steel available for maximum corrosion protection.
- Manufactured in an ISO 9001certified facility.
- 16 sizes, color-coded EPDM, Nitrile, and Silicone elastomers may be used with various hardware options to match performance characteristics with service conditions.
For more information about LINK-SEALS®, contact Piping Specialties, Inc.
https://psi-team.com
800-223-1468
Labels:
ceiling,
concrete wall,
Connecticut,
Link-Seal,
Maine,
Massachusetts,
New Hampshire,
piping,
Rhode Island,
Vermont
Jet Pump (Eductor) Theory of Operation
Jet Pump (courtesy of Emerson Penberthy) |
Also known as eductors, jet pumps operate on the principles of fluid dynamics. An operating fluid medium, which is referred to as the MOTIVE, placed under pressure, enters the inlet and is forced through the nozzle where it is converted into a high-velocity stream. This high-velocity stream decreases the pressure in the suction chamber, creating a partial vacuum that draws the suction material into the chamber where it is entrained by the motive medium. Once the SUCTION stream is drawn in, shear between the motive medium and the transported material causes both media to be intermixed and pumped out the DISCHARGE outlet, dispelled at a pressure greater than that of the SUCTION stream but lower than that of the MOTIVE. This basic principle of fluid dynamics is what makes jet pumps work.
MOTIVE:
This function is the power phase of the pumping operation. At this stage, the velocity of the motive medium increases as it passes through a nozzle. This phase of the pumping operation takes advantage of the kinetic properties of the motive medium, whether it is liquid, steam or gas. Because of this, design differences may exist within the motive connection of the jet pump.
For instance, jet pumps with liquid motives use a converging nozzle, since liquids usually cannot be compressed. On the other hand, jet pumps with gas or steam motives use converging/ diverging nozzles to achieve transsonic flow velocity. The critical flow paths of all jet pumps are machined smoothly with no abrupt turns or steps in order to produce the most efficient flow during the motive function. Without this direct flow design and smooth interior surface, the jet pump would not operate at peak efficiency.
Click for larger view. |
This connection is where the pumping action takes place. The high velocity stream of the motive causes a drop in pressure in the suction chamber. This allows pressure in the suction vessel to push a liquid, steam or gas into the suction chamber of the jet pump. This, in turn, is entrained by the high-velocity motive stream emerging from the inlet nozzle.
DISCHARGE:
As the motive flow combines with the suction medium, some kinetic energy of the motive is transferred to the suction, mixing and discharging at a reduced pressure. The amount of pressure that can be recovered depends on the ratio of motive flow to suction flow, plus the amount of suction pressure built up in the suction vessel. Kinetic energy is converted back to pressure as the mixed media passes through the diverging taper and is discharged from the pump.
For more information about jet pumps and their applications, contact Piping Specialties, Inc. by calling 800-223-1468 or by visiting their web site at https://psi-team.com.
Labels:
Connecticut,
Eductor,
Jet Pump,
Maine,
Massachusetts,
New Hampshire,
Penberthy,
Rhode Island,
Vermont
Subscribe to:
Posts (Atom)