MFC & JFC Pneumatic Adjustable Flow Control Valves

Chris Agricola — Fri, 29 May 2015 13:32:44 +0000

Category:

�ǳ�web offers five models of adjustable flow controls with #10-32 through 3/8" NPT ports with many connection and adjustment options. They feature a combination needle and check valve that controls flow in one direction and allows free flow in the opposite direction. They are an ideal valve for use with a cylinder, providing a slow extend stroke while allowing a fast retract stroke. The chart illustrates the flow versus the number of needle adjustments turns.

Materials:
Aluminum, anodized aluminum,
or brass body; nitrile seals

Input Pressure:
150 psig max. (MFC-2: 300 psig)

Pressure to Open:
Cracks at approx. 2 psig

Mounting: Direct (MFC-2: in-line)

Special configurations are available. Contact �ǳ�web for more information.

Part No.	Port	Adjustment

MFC-2	#10-32F	Knurled Knob


MFC-3A MFC-3AK MFC-3AR	#10-32	Screwdriver Slot Knurled Knob Recessed Needle


MFC-3B MFC-3BK MFC-3BR	#10-32	Screwdriver Slot Knurled Knob Recessed Needle

JFC-2A JFC-3A JFC-3BR	1/8" NPT	Knurled Knob Knurled Knob Recessed Needle

JFC-2B JFC-3B JFC-3BR	1/8" NPT	Screwdriver Slot Knurled Knob Recessed Needle

JFC-4K JFC-4R	#10-32	Knurled Knob Recessed Needle

JFC-5K JFC-5R	#10-32	Knurled Knob Recessed Needle

Tags:

Flow Control

mfc

JFC

Components Automate Manual Fill Operation

Rachel Desenberg — Mon, 24 Feb 2014 15:18:07 +0000

Category:

Applications

Original Article, February 2014
By Michael Jermann

Charter Engineering Group was contracted by a Northwest US-based food manufacturer to design and fabricate a machine to automate a manual fill operation. The fill material is a heated, viscous cheese product that is poured into fiberglass trays and later cooled and cut for packaging. �ǳ�web Instrument Laboratory supplied the pneumatic components used in the design.

"�ǳ�web components have been used by our company on many projects over many years. The cylinders are long-life products offering stainless-steel washdown and reliability of use," said Jay Rosen, professional engineer and owner of Charter Engineering Group. "The costs are equivalent to other vendors. More importantly, the sales applications staff has always been helpful and supportive on product questions for new and custom applications."

The machine, marketed as "Index and Fill", continuously measures the weight of food product emptying into the trays and includes a forward push system. The index push system is fully pneumatic and uses two, 2-in. bore air cylinders (model UDR-32) with magnetic pistons, external cylinder mounted reed switches (RPS-S3), and meter out flow control valves (model JFC) to control the indexing motions.

"Competitive quotations suggesting electrical designs that incorporated stepper motors and encoders, PLC programming and similar designs were eliminated by the customer as too costly and complicated and not easily maintained by plant personnel," said Rosen. "Similarly, designs using conveyor belts were discussed as being difficult to clean."

In this application, the trays are filled with product to a customer-selected weight (typically 40 to 100 lb) while air cylinders and pneumatic logic control the index movements.

In operation, the trays are weighed on custom designed load cell rails. Weight actuates the pneumatic index system, moving the trays in a 3-step direction with air cylinders. The front tray length is filled to one-half the finish weight and then indexed forward and filled to the final weight. The trays are then pushed forward to the unload position.

What was a three-to-four person manual push and weigh operation has been simplified to a one-man operation. These machine steps are being repeated for several hundred trays in a production day. Similar applications exist to fill and move bags, boxes, crates, and large containers with food product of higher fill weights (typically 25-plus lb) and container throughput of 15 sec. and greater.

The machine is design-built to meet USDA and FDA food sanitation standards. The frame construction is stainless steel and all components are NEMA 4X.

Tags:

Cylinders

Stainless Steel Cylinders

�ǳ�web Knowledgebase - JFC

MFC & JFC Pneumatic Adjustable Flow Control Valves

Components Automate Manual Fill Operation