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1. KOREA WATER RESOURCES CORPORATION HWASEONG BRANCH invites tenders for Hwaseong (Jeong) Filter Paper Discharge Valve Installation Work

Subjects
Korea Water Resources Corp., Aquatic resources -- South Korea, Valves, News, opinion and commentary
Abstract

KOREA WATER RESOURCES CORPORATION HWASEONG BRANCH, South Korea has invited tenders for Hwaseong (Jeong) Filter Paper Discharge Valve Installation Work. Tender Notice No: B3202402738-00 Deadline: September 5, 2024 Copyright © [...]

Published
2024

2. KOREA WATER RESOURCES CORPORATION HWASEONG BRANCH invites tenders for (Procurement Consignment) Manufacture and Purchase of Hwaseong (Jeong) Filter Paper Drain Valves

Subjects
Korea Water Resources Corp., Aquatic resources -- South Korea, Valves, News, opinion and commentary
Abstract

KOREA WATER RESOURCES CORPORATION HWASEONG BRANCH, South Korea has invited tenders for (Procurement Consignment) Manufacture and Purchase of Hwaseong (Jeong) Filter Paper Drain Valves. Tender Notice No: 20240733394-00 Deadline: August [...]

Published
2024

4. UTILITY STATE GOVERNMENT ENTERPRISE ALMATY ELECTROMECHANICAL COLLEGE OF THE EDUCATION DEPARTMENT OF THE CITY OF ALMATY invites tenders for Office Equipment Paper, Emulsion, Valve

Subjects
Valves, Government business enterprises, State government, Electronic office machines, News, opinion and commentary
Abstract

UTILITY STATE GOVERNMENT ENTERPRISE ALMATY ELECTROMECHANICAL COLLEGE OF THE EDUCATION DEPARTMENT OF THE CITY OF ALMATY, Kazakhstan has invited tenders for Office Equipment Paper, Emulsion, Valve. Tender Notice No: 12630193-1 [...]

Published
2024

6. KOREA WATER RESOURCES CORPORATION, GYEONGGI-NORTHEAST REGION BRANCH invites tenders for Manufacture, Purchase and Installation of Wabu (Jeong) 3Rd Stage Filter Paper Outflow Valve Reducer

Subjects
Korea Water Resources Corp., Aquatic resources -- South Korea, Valves, News, opinion and commentary
Abstract

KOREA WATER RESOURCES CORPORATION, GYEONGGI-NORTHEAST REGION BRANCH, South Korea has invited tenders for Manufacture, Purchase and Installation of Wabu (Jeong) 3Rd Stage Filter Paper Outflow Valve Reducer. Tender Notice No: [...]

Published
2024

8. INCHEON METROPOLITAN CITY WATERWORKS BUSINESS HEADQUARTERS NAMDONG WATER PURIFICATION OFFICE invites tenders for 2024 Filter Paper Air Valve Replacement (Contract) Construction

Subjects
Water utilities -- Contracts, Water -- Purification, Valves, Building -- Contracts, Contract agreement, News, opinion and commentary
Abstract

INCHEON METROPOLITAN CITY WATERWORKS BUSINESS HEADQUARTERS NAMDONG WATER PURIFICATION OFFICE, South Korea has invited tenders for 2024 Filter Paper Air Valve Replacement (Contract) Construction. Tender Notice No: 20240440158-00 Deadline: May [...]

Published
2024

10. SEOUL ARISU HEADQUARTERS, YEONGDEUNGPO ARISU WATER PURIFICATION CENTER, SEOUL invites tenders for 1 Installation of Electric Drive Device for Water Purification Plant Filter Paper Backwash Valve

Subjects
Water treatment plants, Valves, News, opinion and commentary
Abstract

SEOUL ARISU HEADQUARTERS, YEONGDEUNGPO ARISU WATER PURIFICATION CENTER, SEOUL, South Korea has invited tenders for 1 Installation of Electric Drive Device for Water Purification Plant Filter Paper Backwash Valve. Tender [...]

Published
2024

12. A Parametric Study on a Paper-Based Bi-Material Cantilever Valve.

Author

Heidari-Bafroui, Hojat, Kumar, Ashutosh, Charbaji, Amer, Smith, Winfield, Rahmani, Nassim, Anagnostopoulos, Constantine, and Faghri, Mohammad

Subjects
VALVES, CANTILEVERS, MICROFLUIDIC devices, FLUID flow, FLUID control, HUMIDITY, ADHESIVE tape
Abstract

The novel paper-based Bi-Material Cantilever (B-MaC) valve allows the autonomous loading and control of multiple fluid reagents which contributes to the accurate operation of paper-based microfluidic devices utilized for biological and chemical sensing applications. In this paper, an extensive parametric study is presented to evaluate the effects of key geometric parameters of the valve, such as paper direction, cantilever width, paper type, tape type, and sample volume, in addition to the effects of relative humidity and temperature on the functionality of the B-MaC and to provide a better understanding of the rate of fluid flow and resulting deflection of the cantilever. Machine direction, cantilever width, paper type, and tape type were found to be important parameters that affect the B-MAC's activation time. It was also observed that the rate of fluid imbibition in the B-MaC is considerably affected by change in humidity for high (55 °C) and low (25 °C) temperatures, while humidity levels have no significant effect during imbibition in the B-MaC at an ambient temperature of 45 °C. It was also found that a minimum distance of 4 mm is required between the B-MaC and the stationary component to prevent accidental activation of the B-MaC prior to sample insertion when relative humidity is higher than 90% and temperature is lower than 35 °C. The rate of fluid imbibition that determines the wetted length of the B-MaC and the final deflection of the cantilever are critical in designing and fabricating point-of-care microfluidic paper-based devices. The B-MaC valve can be utilized in a fluidic circuit to sequentially load several reagents, in addition to the sample to the detection area. [ABSTRACT FROM AUTHOR]

Published
2022
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13. Purchase Of Minelax Paper And Foot Valve Leather

Subjects
Valves, Business, international
Abstract

Tenders are invited for Purchase of Minelax Paper and Foot Valve Leather Tender Category: Goods OpeningDate: Mar 22 2024 12:00AM Major organization: Tamil Nadu Co.operative Sugar Federation Limited Address: Department [...]

Published
2024

14. Supply Of Insulation Tape, Anabond 673, Elect Rodes Welding, Cutting Wheel 255mm, Wire Electric, Grinding Wheels 100mm, Abb Emery Paper, Clamp Hose Size, Terminal Connector Cable, Solenoid Switch, Autaomatic Voltage Regulator, Inlet Exhaust Valve, Liner -

Subjects
Voltage regulators, Valves, Electric current regulators, Business, international
Abstract

Tenders are invited for Supply of insulation tape, anabond 673, elect rodes welding, cutting wheel 255mm, wire electric, grinding wheels 100mm, abb emery paper, clamp hose size, terminal connector cable, [...]

Published
2024

15. Supply of rs valve modification rs valve modification (rdso/2023/el/ms/0491 rev :0' dt. 27-03-2023) indicationsticker as per sample sketch attached sticker with wax paper 130 gsm and tospecification rdso/2006/cg- 13 (rev- 1) or latest with option b. wa

Subjects
Valves, Business, international
Abstract

Tenders are invited for Supply of rs valve modification rs valve modification (rdso/2023/el/ms/0491 rev:0' dt. 27-03-2023) indicationsticker as per sample sketch attached sticker with wax paper 130 gsm and tospecification [...]

Published
2024

16. Supply Of Copper Washer For Ndr Valve, Fuel Return Rubber Pipe Line Joint With Clip, Self Starte Assy 24 Volt, Fan Drive Belt A 56, Fan Drive Belt A 47, Fan Belt Dc Alternetor, Oil Filter Medium Paper Type, Oil Pressure Pipe Flexible, Oil Pressure Pipe Fo

Subjects
Pipe lines, Copper, Measuring instruments, Valves, Fuel, Rubber, Business, international
Abstract

Tenders are invited for Supply of Copper Washer for Ndr Valve, Fuel Return Rubber Pipe Line Joint with Clip, Self Starte Assy 24 Volt, Fan Drive Belt a 56, Fan [...]

Published
2024

17. Supply Of Sediment Driven Valve Seal, Bawal Gear Box Seal Medium, Bawal Gear Box Seal Small, Eopp Seal, Hand Primer Diaghpram, Apr Kit, Fip Delivery Seal, Fine Filter Rubber Seal, Air Comp Blower Seal, Fine Filter Paper Seal, Fuse 400 Amp, Crank Shaft Oil

Subjects
Valves, Sediments (Geology), Rubber, Business, international
Abstract

Tenders are invited for Supply of Sediment Driven Valve Seal, Bawal Gear Box Seal Medium, Bawal Gear Box Seal Small, Eopp Seal, Hand Primer Diaghpram, Apr Kit, Fip Delivery Seal, [...]

Published
2024

21. Supply Of Emery Papers Sheet No 320, Emery Papers Sheet No 400, Emery Paper Cloth Roll 341d, Sanding Screen Roll 483 W, Valve Grinding Stick 1 By 2 Inch, Valve Grinding Stick 3 By 4inch, Valve Grinding Stick 1 Inch, Aluminium Popup Rivets Size, O Ring Kit

Subjects
Polymethylmethacrylate, Textile fabrics, Valves, Business, international
Abstract

Tenders are invited for Supply of Emery Papers Sheet No 320, Emery Papers Sheet No 400, Emery Paper cloth Roll 341D, Sanding Screen Roll 483 W, Valve Grinding Stick 1 [...]

Published
2023

22. Supply Of Switch Modular 16 Amp Make Havells Anchor Cone, Socket 5 Amp Make Havells Anchor Cone, Socket 15 Amp Make Havells Anchor Cone, Welding Rod Isi Marked, Pvc Pipe 100mm Isi Marked, Float Valve 25 Mm Brass, Toilet Paper Holder, Acp Sheet 8 Feet X4 F

Subjects
Switches, Valves, Business, international
Abstract

Tenders are invited for Supply of Switch Modular 16 Amp Make Havells Anchor Cone, Socket 5 Amp Make Havells Anchor Cone, Socket 15 Amp Make Havells Anchor Cone, Welding Rod [...]

Published
2024

24. Development of a New Lab-on-Paper Microfluidics Platform Using Bi-Material Cantilever Actuators for ELISA on Paper.

Author

Heidari-Bafroui, Hojat, Kumar, Ashutosh, Hahn, Cameron, Scholz, Nicholas, Charbaji, Amer, Rahmani, Nassim, Anagnostopoulos, Constantine, and Faghri, Mohammad

Subjects
FLUIDICS, CANTILEVERS, LOGIC circuits, IMMUNOGLOBULIN G, ACTUATORS, MICROFLUIDICS, VALVES
Abstract

In this paper, we present a novel and cost-effective lab-on-paper microfluidics platform for performing ELISA autonomously, with no user intervention beyond adding the sample. The platform utilizes two Bi-Material Cantilever Valves placed in a specially designed housing. The integration of these valves in a specific channel network forms a complete fluidic logic circuit for performing ELISA on paper. The housing also incorporates an innovative reagent storage and release mechanism that minimizes variability in the volume of reagents released into the reagent pads. The platform design was optimized to minimize variance in the time of fluid wicking from the reagent pad, using a randomized design of experiment. The platform adheres to the World Health Organization's ASSURED principles. The optimized design was used to conduct an ELISA for detecting rabbit immunoglobulin G (IgG) in a buffer, with a limit of detection of 2.27 ng/mL and a limit of quantification of 8.33 ng/mL. This represents a 58% improvement over previous ELISA methods for detecting rabbit IgG in buffer using portable microfluidic technology. [ABSTRACT FROM AUTHOR]

Published
2023
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27. Supply of Paper Valve Product Bags Rc 822

Subjects
Valves, Business, international
Abstract

Tenders are invited for Supply of Paper Valve Product Bags Rc 822 Tender Category : Goods OpeningDate : Dec 6 2023 11:30AM Major organization : Kerala Minerals And Metals Limited [...]

Published
2023

31. Supply Of Seal Ring, Snap Ring, Seal Ring, O-ring, Seal, Piush Rod Sleeve, Seal Ring, Paper Catridge, Seal Ring, O-ring, Seal Ring, Seal Ring, Hexagon Nut, Injection Nozzle, Seal Ring, Round Seal Ring, Seal Ring, Seal Ring, Starting Valve, Sieve Element

Subjects
Valves, Business, international
Abstract

Tenders are invited for Supply of Seal Ring, Snap Ring, Seal Ring, O-ring, Seal, Piush Rod Sleeve, Seal Ring, Paper Catridge, Seal Ring, O-ring, Seal Ring, Seal Ring, Hexagon Nut, [...]

Published
2023

33. Supply Of Metal Coupling, Rubber Coupling, Capacittor, Pipe Hose Union, Field Coil No 1, Coupling Bearing, Wheel Valve, Ball Valve, Fuel Filter Cloth, Fuel Filter Paper, Oil Filter, Oil Filter Pvc, Oil Filter Silent, Pre Filter, Fine Filter, Fuel Filter W

Subjects
Valves, Rubber, Business, international
Abstract

Tenders are invited for Supply of Metal Coupling, Rubber Coupling, Capacittor, Pipe Hose Union, Field Coil No 1, Coupling Bearing, Wheel Valve, Ball Valve, Fuel Filter Cloth, Fuel Filter Paper, [...]

Published
2023

35. Supply Of Clutch Cyl Assy, Clutch Rel Brg, Bd Valve Assy, Oil Filter, Fuel Filter W Sep, Fuel Filter Cloth, Fuel Filter Paper, Fuel Filter, Solenoid Switch 3 Pin, Solenoid Switch, Flasher Unit, 4st Relay, Accelator Cable, Rep Kit Air Dryer, Wheel Cyl Rep

Subjects
Valves, Business, international
Abstract

Tenders are invited for Supply of Clutch Cyl Assy, Clutch Rel Brg, Bd Valve Assy, Oil Filter, Fuel Filter W Sep, Fuel Filter Cloth, Fuel Filter Paper, Fuel Filter, Solenoid [...]

Published
2023

36. Purchase Of Material 63 Kv Ht Coil Double Paper Covered Aluminium Wire, 63 Kv Ht Coil, 100 Kv Ht Coil, Transformer Ht Coil, 25 Kva Ht Coil, Ht Lt Cockshit Washer, Lt Stud Rod, Ht Stud Rod, Lt Ht Rubber Valve, Ht Gasket Washer, Gasket Sheet, Neoprin Washer

Subjects
Aluminum products, Valves, Rubber, Business, international
Abstract

Tenders are invited for Purchase Of Material 63 Kv Ht Coil Double Paper Covered Aluminium Wire, 63 Kv Ht Coil, 100 Kv Ht Coil, Transformer Ht Coil, 25 Kva Ht [...]

Published
2023

37. Auction Sale Item Of C.i.boring Turning, Item Code Pf2000a58 Unwrought Aluminium Ingots (non Usable), Item Code Genot2000gat39 Gatta Waste Paper Scrap, Item Code Genev2000eb11 Scrap End Bits Of Valve Steel Mixed With Oil Dust, Item Code Genev2000evn10 Ev

Subjects
Auctions, Valves, Business, international
Abstract

Tenders are invited for Auction Sale Item of C.i.boring Turning, Item Code Pf2000a58 Unwrought Aluminium Ingots (non Usable), Item Code Genot2000gat39 Gatta Waste Paper Scrap, Item Code Genev2000eb11 Scrap End [...]

Published
2023

38. Supply Of Fuel Filter, Oil Filter, Air Filter, Fuel Pipe, Electronic Voltage Regulator, Valve Oil Seal, Abbrasive Paper Emery Or Corundum Is Grit, Sealing Compound Anabond 673 Qty : 52

Subjects
Voltage regulators, Valves, Electric current regulators, Aluminum oxide, Business, international
Abstract

Tenders are invited for Supply of Fuel Filter, Oil Filter, Air Filter, Fuel Pipe, Electronic Voltage Regulator, Valve Oil Seal, Abbrasive Paper Emery or Corundum is Grit, Sealing Compound Anabond [...]

Published
2023

39. Supply Of Hose Assembly, Rep Kit Dual Brake Valve, Brake Hose, Hose Dia 19.25mm, Assy Fuel Filter, Assy Oil Filter, Assy Combination Switch, Paper Element Filter, Rear Hub Brg, Sleeve Clutch Hub, Brg Clutch Release, Repair Kit Compressor. Qty : 22

Subjects
Valves, Business, international
Abstract

Contract Award for Supply of hose assembly, rep kit dual brake valve, brake hose, hose dia 19.25mm, assy fuel filter, assy oil filter, assy combination switch, paper element filter, rear [...]

Published
2023

41. Supply Of Speedometer, Differential Oil Seal, Assy Power Steering, Prefilter Insert Paper Types, Bty Cut Off Switch, Fuel Filter Assy, Bearing Rear Hub, Valve Seal, Rocker Arm, Clutch Plate, Ball Socket Head Assy, Rectifier Assy 24v, King Pin Bush, Oil Se

Subjects
Valves, Business, international
Abstract

Contract Award for Supply of speedometer, differential oil seal, assy power steering, prefilter insert paper types, bty cut off switch, fuel filter assy, bearing rear hub, valve seal, rocker arm, [...]

Published
2023

42. Supply Of H Shower Jet, Tap, Flush Tank System, Flush Tank Ball, Waste Pipe, Angle Valve, Wash Basin, Wash Basin Mixer, Pvc Connection, Toilet Paper Roll Holder, Cp Nipple, Teflon Tape, White Cement, Pipe 3by4, Egul Elbow 3by4, Mta 3by4 X 3by4, F Elbow 3b

Subjects
Valves, Business, international
Abstract

Tenders are invited for Supply of H Shower Jet, Tap, Flush Tank System, Flush Tank Ball, Waste Pipe, Angle Valve, Wash Basin, Wash Basin Mixer, PVC Connection, Toilet Paper Roll [...]

Published
2023

43. Automated device for multi-stage paper-based assays enabled by an electroosmotic pumping valve.

Author

Rofman, Baruch, Naddaf, Rawi, Bar-Dolev, Maya, Gefen, Tal, Ben-Assa, Nadav, Geva-Zatorsky, Naama, and Bercovici, Moran

Subjects
*VALVES, *POROUS materials, *SUPERHYDROPHOBIC surfaces, *SURFACE stability, *PRINTED circuits
Abstract

We leverage electroosmotic-flow generation in porous media in combination with a hydrophobic air gap to create a controllable valve capable of operating in either finite dosing or continuous flow mode, enabling the implementation of multi-step assays on paper-based devices. The hydrophobic air gap between two paper pads creates a barrier keeping the valve nominally closed. Electroosmotic actuation, implemented using a pair of electrodes under the upstream pad, generates sufficient pressure to overcome the barrier and connect the two pads. We present a model describing the flow and governing parameters, including the electric potentials required to open and close the valve and the threshold potential for switching between the modes of operation. We construct the air gap using a hierarchical superhydrophobic surface and study the stability of the closed valve under strenuous conditions and find good agreement between our model and experimental results, as well as stable working conditions for practical applications. We present a straightforward design for a compact and automated device based on paper pads placed on top of printed circuit boards (PCB), equipped with heating and actuation electrodes and additional power and logic capabilities. Finally, we demonstrate the use of the device for amplification of SARS-CoV-2 sequences directly from raw saliva samples, using a loop-mediated isothermal amplification (LAMP) protocol requiring sample lysis followed by enzymatic deactivation and delivery to multiple amplification sites. Since PCB costs scale favorably with mass-production, we believe that this approach could lead to a low-cost diagnostic device that offers the sensitivity of amplification methods. [ABSTRACT FROM AUTHOR]

Published
2022
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44. Supply Of Oil Seal, Bearing Single Row Roller 35, Rubber Impeller For Pump, Tablets Sanuril (25lb|11 Kg), Maintenance Kit For Blower, 1 Litre Can Anderol 555, Paper Gaskets, O Ring 3|4 X 3|32, Circlip, Cylinder Gasket, Circlip 15mm, Delivery Valve Disc Ty

Subjects
Valves, Lubricants industry, Rubber, Business, international
Abstract

Tenders are invited for Supply of Oil Seal, Bearing Single Row Roller 35, Rubber Impeller for Pump, Tablets Sanuril (25lb/11 Kg), Maintenance Kit for Blower, 1 Litre Can Anderol 555, [...]

Published
2023

45. Supply Of Seat Ring Valve Inlet, Gasket, Turbo Charger, Counter Ring, Coolant Level Sensor, Ring Sealing, Sleeve, Stress Bolt, Half Coupling, Fuel Delivery Pump, Washer, Insert Paper, O Ring, O-ring, Corrosion Inhibitor Conc. Coolant Cs100, Cooler Core, N

Subjects
Measuring instruments, Sensors, Chemical inhibitors, Corrosion and anti-corrosives, Valves, Business, international
Abstract

Tenders are invited for Supply of Seat Ring Valve Inlet, Gasket, Turbo Charger, Counter Ring, Coolant Level Sensor, Ring Sealing, Sleeve, Stress Bolt, Half Coupling, Fuel Delivery Pump, Washer, Insert [...]

Published
2023

46. Supply Of Sleeve Cyl Assy, Valve Relay Air Pressure, Double Lever Combination Switch, Kit Pressure Regulating Valve, Gasket Cyl Head, Tape Insulating, Ply Wood For General Purposes, Electrodes Welding, Abrasive Paper Emery, Malmal Cotton White, Paint Rfu

Subjects
Switches, Electrodes, Valves, Business, international
Abstract

Tenders are invited for Supply of Sleeve Cyl Assy, Valve Relay Air Pressure, Double Lever Combination Switch, Kit Pressure Regulating Valve, Gasket Cyl Head, Tape Insulating, Ply Wood for General [...]

Published
2023

48. Supply Of Flag Rod, Duco Thinner, 3d Matting, Head Light Tube Bulb Three Pin Type, Wheel Grinder, Wiper Blade 14, Wiper Blade 16, Wiper Blade18, Wiper Blade 24, Starter Switch, Foam Bottle, Nozzle, Qrc, Qrc Coupling, Foot Valve, Wasing Gun, S Paper 80, Se

Subjects
Valves, Business, international
Abstract

Tenders are invited for Supply of Flag Rod, Duco Thinner, 3D Matting, Head Light Tube Bulb Three Pin Type, wheel grinder, Wiper Blade 14, wiper Blade 16, wiper Blade18, wiper [...]

Published
2023

50. Improved sensitivity in paper-based microfluidic analytical devices using a pH-responsive valve for nitrate analysis.

Author

Sousa, Lucas R., Moreira, Nikaele S., Guinati, Bárbara G.S., Coltro, Wendell K.T., Cortón, Eduardo, and Figueredo, Federico

Subjects
*MICROFLUIDIC devices, *VALVES, *COLORIMETRIC analysis, *ANALYTICAL chemistry, *BIOMEDICAL materials
Abstract

This paper presents an innovative application of chitosan material to be used as pH-responsive valves for the precise control of lateral flow in microfluidic paper-based analytical devices (μPADs). The fabrication of μPADs involved wax printing, while pH-responsive valves were created using a solution of chitosan in acetic acid. The valve-forming solution was applied, and ready when dry; by exposure to acidic solutions, the valve opens. Remarkably, the valves exhibited excellent compatibility with alkaline, neutral, and acidic solutions with a pH higher than 4. The valve opening process had no impact on the flow rate and colorimetric analysis. The potential of chitosan valves used for flow control was demonstrated for μPADs employed for nitrate determination. Valves were used to increase the conversion time of nitrate to nitrite, which was further analyzed using the Griess reaction. The μPAD showed a linear response in the concentration range of 10–100 μmol L−1, with a detection limit of 5.4 μmol L−1. As a proof of concept, the assay was successfully applied to detect nitrate levels in water samples from artificial lakes of recreational parks. For analyses that require controlled kinetics and involve multiple sequential steps, the use of chitosan pH-responsive valves in μPADs is extremely valuable. This breakthrough holds great potential for the development of simple and high-impact microfluidic platforms that can cater to a wide range of analytical chemistry applications. [Display omitted] • The development of pH-responsive valves offers a simple fabrication method and operational advantage in paper-based devices. • Control over the chitosan valve is achieved by adjusting the proton concentration using acid solutions • Chitosan is a biocompatible material for constructing valves, enabling precise control over nitrate reduction • A proof-of-concept study using urban park water analysis demonstrates the effectiveness of chitosan valves. [ABSTRACT FROM AUTHOR]

Published
2024
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