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MITSUMI Iris Valve "Choke Valve" - AAA Save Energy Site

Contact MITSUMI Technical Industry
c/o AAA Save Energy / AAAmachine. Inc.
1291 Rand Road, Des Plaines, IL 60016
Tel: 847-481-8264, Fax: 847-376-3530

Please download the EDS (Engineering Data Sheet) for your detailed inquiry and /or quotation request.

>> No account with us? (new customers) 

No problem. If you would like to buy MITSUMI Technical Industry products through internet using your credit card, please visit E-commerce site as follows.

You can buy MITSUMI Technical Industry (Iris Valve "CHOKE VALVE) through AAA Save Energy/AAAmachine, Inc. Shop On-Line (international Buy-direct E-commerce service powered by BigCommerce) using your credit card.

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Mitsumi's iris valves, "half action" of normal iris valves (about 90-degree rotation), can close/open the valve. As a result, air cylinders can be used for this automatic operation. The company's iris valves can decrease total system cost. Mitsumi's iris breakers can break bridges and discharge powders/bulks by squeezing a hopper-type chute outside with a rope.


MITSUMI Iris Valve "Choke Valve"

 

Please download brochure (pdf, 968kb, 6 pages)
>>> Shop on-line
How it works?
Please visit MITSUMI web site for video.


Great Features

Throughout history, rope and cloth has been cleverly used in an effort to improve life for mankind. At present, various kind of rope that has superior mechanical strength and chemical characteristics, some a few millimeters in diameter but stronger than steel, have been developed to withstand a load of several hundred kilograms. 

An entirely new type of powder and granule flow control choke valve utilizing rope and cloth has been developed by Mitsumi Technical Industry Co.,Ltd.

With many kinds of granulated materials being increasingly used in recent years, the choke valve offers superb performance for opening/closing operation and flow control by attaching it to the inlet or outlet of powder and granule processing machines such as bins, hoppers, etc.

The automatic type choke valve is specifically designed for remote control and perfectly meets the users’ specifications for sanitation and fine chemical plants. It is now being used extensively for broad applications in many fields, throughout industry 

(1) Configuration and performance 

The choke valve is very simple in construction. The sleeve valve is fitted in the setting slot in the face of the flange on the casing, while the choke rope is set under the wall inside the casing. Also, a number of ropes are arranged in parallel at equal intervals on the choke ring. By turning the choke ring about 90° manually or automatically, the choke rope locks (binds) the sleeve valve towards the center of the valve.

When it is turned in the reverse direction, the sleeve valve is unlocked(released), allowing the valve to be opened or closed, as shown in Fig. 1 (in the brochure). The choke valve is opened and closed smoothly like a lens shutter, thus ensuring superb powder & granule flow control.  


(2) Features 

- The sleeve valve can easily be removed and replaced(detachable at one touch).
- Powder and granules pass through the valve smoothly without interference.
- Powder and granules make contact only with the inside wall of the sleeve valve, not with other metallic parts (casing, etc.).
- Small operation torque (involute curve effect). Opening torques are almost 0.
- The valve is simple in construction, permitting easy disassembly and reassembly.
- The material of the sleeve valve can be selected according to sanitary and fine chemical specifications.
- Opening and closing angle (shifting angle of handle or lever) is as little as 90°.
- Ultrafine powder as well as air can be sealed by using appropriate coating cloth and rubber.
- Various types of forced opening adaptors can easily be installed for quick and complete opening of the sleeve valve.

(3) Dimensions


* Valve size other than above is also available. Please contact us.
* Automatic intermediate stop (opening control mechanism) can be achieved using air cylinder (MAV) model.

(4) Specifications

Standard specifications (80A to 200A)
1) Choke ring: 304 stainless steel plus Chrome plating
2) Choke rope: HMWPE (High Molecular Weight Polyethylene) fiber rope (3mm dia.), Polyester or Nylon
3) Sleeve valve type: Upper/Lower sleeve valves both to be inserted into the setting slots
4) Sleeve valve material: Polyester with anti static treatment & silicon coated or Nylon
5) Casing: AC7A Aluminum Alloy with Alumite plating
6) Handle: A6063 Aluminum Alloy with Alumite plating
7) Handle stopper: Polyacetal plastics
8) Sleeve maximum depth when opened: 50 mm (about 2 inch) from flange bottom surface
Standard specifications (250A or larger)
1) Choke ring: 304 stainless steel plus Chrome plating
2) Choke rope: HMWPE (High Molecular Weight Polyethylene) fiber rope (4mm dia.), Polyester or Nylon
3) Sleeve valve type: Upper/Lower sleeve valves both to be inserted into the setting slots
4) Sleeve valve material: Polyester with anti static treatment & silicon coated or Nylon
5) Casing: AC7A Aluminum Alloy with Alumite plating
6) Handle: Mild steel with chrome plating
7) Handle stopper: Polyacetal plastics
8) Sleeve maximum depth when opened: 120 mm (about 5 inch) from flange bottom surface

(5) Sleeve Valve



(6) Forced-opening adapter
There are 2-type adapters - (A) Opener type and (B) Weight type


(7) How to replace sleeve valve? It is quick and easy! No tool is required.


(8) Parts name & precautions when using forced-opening adapter
<1> Sleeve valve lower set supporting flange (outlet side): When the bottom of the choke valve is open, that is, when it is not provided with a connecting pipe, and if the sleeve valve is fully opened, the lower set is given a downward tension by the action of the adapter and hence another flange needs to be installed to prevent the sleeve valve from dropping off the valve.
<2> Connecting pipe at the bottom of "CHOKE VALVE" (outlet side): When the sleeve valve is fully opened by the action of the adapter, it is forced against the wall of the connecting pipe as shown below, or in the case of a weight type, the effective area of the valve is reduced. To avoid this situation, the connecting pipe should have the same diameter as the inside one of valve casing.


① Casing,② Choke ring, ③ Handle (MFV type) / Arm (MAV type), ④ Stopper (MFV type only), ⑤ Sleeve valve, ⑥Choke rope, ⑦ Hexagonal bolt, ⑧ Gasket/Packing, ⑨ Opener, ⑩ Stainless steel weight, ⑪ Bush for standard type flange, ⑫ Flange (Special sized inner diameter flange to prevent from dropping off the sleeve valve) 

(9) Items to be specified when ordering choke valve

- Valve drive system(manual or automatic)- Type of valve (inside diameter)

- Material of easing (aluminum, stainless steel, aluminum surface treatment)

- Material and type of sleeve valve

- Adaptors (with or without)

- Power source and operating air pressure (for automatic type)

- Necessity of intermediate stop

- Name, characteristics, shape, hardness and flowing efficiency of powder and granules to be used (in detail)

- Devices connected to valve

- Spare parts (with or without)

Please send us your inquiry using the following questionnaire.
We will contact you with pricing and the lead time upon receipt of your inquiry.
Thank you for your valued interest in MITSUMI Iris Valve "CHOKE VALVE".



AAA Save Energy, LLC. / AAAmachine, Inc.

>> No account with us? (new customers) 

No problem. If you would like to buy MITSUMI Technical Industry products through internet using your credit card, please visit E-commerce site as follows.

You can buy MITSUMI Technical Industry (Iris Valve "CHOKE VALVE) through AAA Save Energy/AAAmachine, Inc. AAAmachine Shop On-Line (international Buy-direct E-commerce service powered by BigCommerce) using your credit card.

*** What is AAA Save Energy / AAAmachine, Inc. Shop On-Line? See details. 
If you have any questions, please use this questionnaire.