ASKA CORPORATIONTECHNOLOGY IN POLYMER

458-1 Minosho-cho, Yamato Koriyama-shi, Nara, 639-1103, Japan
Tel: +81-743-54-2455 Fax:+81-743-55-0128 Website: www.bb-aska.co.jp

Corporate Profile and Product Introduction
Aska Corporation, founded in 1974, is a skilled Japanese manufacturer of tailor-made specialty valves.
It supplies large quantities of valves to petrochemical, synthetic fiber, pharmaceutical, agriculturalchemicals, and power and energy companies in over 40 countries worldwide.

Features of Aska Special Valves
1. ORIGINAL VALVESAll of Aska valves are manufactured according to customer order. Valve design reflects customer
specifications, so all valves are unique.
2. HEATING UNIFORMITY
The full jacket (heating shell) type valve has no locally hot nor cool parts. Jacketed flanges are alsoavailable.
3. DEAD SPACE FREE
No dead space in the valve allows smooth fluid flow.
4. BUFFING
Mirror-buffed finish is available, also allowing smooth fluid flow.
5. TIGHT SEALING
Valve seats and valve discs all come with a Stellite® welded face. High precision machining assuresa tight seal even under vacuum.
6. HEAT TREATMENT
Welded valves are heat treated to avoid physical stress deformation.
7. INSPECTION AND TESTING
In addition to the manufacturer’s standard inspection, high temperature operation and leak test isalso available.
8. MATERIALS
Stainless steel is our standard: CF8 (SS304), CF8M (SS316), etc. Special materials such as
Hastelloy®, titanium, Carpenter®, Monel®, nickel etc. are available upon request. Teflon® coatingand lining are also available.
9. APPLICATION
Aska valves are used in processes involving chemicals, fine chemicals, fibers, film, resin,
pharmaceuticals, nuclear power, food and beverages, and more.
Used especially for PET, PC, PBT, PP, PE, PS, PU, PVC, PTA, PLA, LCD, PA etc.
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Application To Polymerization Process
To introduce the various types of our products, the following is an image of the polymerization
process, as an example, showing what type of valve is used at each of the various stages of theprocess. The illustration is simplified, and is not an exact process flow diagram.
Valve Types
Y-GlobeSampling
Flush Bottom
Injection
Diverter
Die HeadFilter

Variety of Valves
Below is an introduction to the variety of valves we manufacture. The valves described are only a few
examples of the many possible. Please contact us with your specifications for other type of valves.

Flush Bottom Tank Valve (Disc type):
Flush bottom valves are designed to provide drainage and dead-space-free shutoff for reactors,vessels, autoclaves and storage tanks. The dead-space-free shutoff is accomplished by fitting the valve
seat to the bottom of the vessel. This eliminates any buildup of product within the vessel nozzle itself.
The advantage of the disc type is its short stroke for opening/closing operations.
Air cylinder (pneumatic cylinder) operation is usual for saving labor.
Ram (Piston) type valves are suitable for polymer applications.
- 2 types of Disc type flush bottom valve available.
Left: Rising Disc Type (TO type)
Right: Lowering Disc Type (TI type)
OPENING INTO TANK

TO type

OPENING INTO VALVE

TI type- Flexible design fitting any vessel nozzle configuration- Exact fit to the wall for Disc lowering type- Crust breaking is available for Disc rising type
- Temperature measurement of vessel is available with built-inthermometer.

- Manual, gear, pneumatic cylinder (spring return or double action) with or without handwheel, electric,
air motor, hydraulic operations- Jacketed type (full-jacketed, semi-jacketed) or non-jacketed (single) type.
- Teflon® coating and lining available for corrosion resistance, chemical resistance and adhesion
prevention of impurities. Not only for polymer, but also pharmaceutical and food applications.
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Examples of Aska Flush Bottom Tank Valves (Disc Type)TO type
20K-4"x3"Flange typeAir cylinder operated
Flush Bottom ValveTO type150psi-5"/3"x3"/2"Flange type
Jacketed
Flush Bottom Valve

TI type
20K-20" x16"
Large size
Flush Bottom valve
Electric motor operated

TI type10K-2"x1.5"
Flange type
Flush Bottom Valvewith Thermometer
PTFE Seat & Lining

Piston Valve / Ram Valve: Ram-type Drain Valve- Flexible design fitting any vessel nozzle configuration.
- Sampling or flushing from pipe line.
- PTFE radial seal for low temperatures.
- Metal to metal seal for high temperatures.
- Flange connection, threaded, etc.
- Crust breaking type available by sharpening top of piston.
- Manual, pneumatic cylinder (double action) with or without
handwheel, air motor, electric operations.

The Aska Ram valve (Piston valve) is a drain valve with a piston-type disc.
It is used for drain, flush and dead space free shut-off for reactors, vessels, pipelines, etc.
Ram valves are preferred to Disc type flush bottom valves when full flow is required.
The Aska Ram valve guarantees full flow, as the valve disc (ram) completely cleans out the valve. The
Ram valve is ideal for slurry applications, as the inside of the valve is cleaned when the ram moves.

P type600psi-3"/2"
Jacketed
Piston Valve

P type600psi-3"x3"
Non-jacketed
Air motor operated
Piston Valve

PCB type
300psi-4"x4"
Non-jacketed
Air cylinder operated
Piston Valve, Crust Breaking

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P type300psi-10"/8"
Jacketed
Air cylinder operated
Piston valve
with Volume tankSampling Valves / Drain Valves:

Verticalmodel

Horizontalmodel

SP type

SPD type

Sampling valves and Drain valves are used to extract fluid from a pipeline. They can be used underhigh pressure or even vacuum conditions.
The ram tip is contoured to match the pipe's inside shape when closed so as not to disrupt fluid flow inthe pipe.
There is no flange between the main pipe and valve body. This feature is effective for polymer
applications to prevent polymer freezing in the valve.
The Aska Vertical model or Horizontal (Tangential) model Sampling Valves / Drain Valves achievecomplete draining of the process line. Can be combined with Diverter valves and Y-Globe valves.

SP type
250K-6"/4"BW x 4"/2" BW
Jacketed
Electric motor operation.
Sampling valve

SP type
2500psi-12"/10"BW x 8"/6"RFJacketed Sampling ValveSPD type2500psi-10"/8"BW x 3"/1.5"
Jacketed Drain valve
Horizontal typeRam disc tangential to inside of pipe.

SP type300#-4"x1"RFWafer Sampling Valve
Non-Jacketed
Pneumatic cylinder

SP type300psi-24"/22"BW x 4"RFJacketed
Air motor operated
Sampling valve

SPD type
10K-8"/6"BW x 3/4"
Jacketed Drain valve
Horizontal type

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Injection Valves:
Injection valves are used for injecting liquid additives directly into thepipeline.
- Liquid is injected to the center of stream, preventing channeling.
- Seat is open only while liquid is being injected.
- Can be mounted on any pipe arrangement.
- Jacketed type (Full-jacketed, Semi-jacketed), or Non-jacketed type.

IJ type

2IJF type

IJ type

2IJF type
300psi-BW x 20A,15A
Air cylinder operated
Double injection valve

2IJ180 type10K-750/650A BW x 100A RFAir cylinder operated
Injection valve
Twin valve type

Expanded view of 2IJ180 type (seeleft).

IJ type600psi-20A-(φ6 x 1500psi-15A
Air cylinder operated
Injection valve

3IJF type
300psi-6"/4"BW x 3"/1.5RF
Air cylinder operated
Triple injection valve
Triple valve typeIJ type
300psi-80A BW x 15A
Air cylinder operated
Injection valve

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Y-Globe Valves:
RAM TYPE- No pocket inside valves.
- Effective back seat for Disc type available.
- Full bore flow through valve- Low pressure drop
- Disc-type and Ram-type designs- Bellows seal available for vacuum service- Manual or automatic operation- Y-type valve combined with flushing valve

DISC TYPE

300psi-12"/10"
Jacketed
Y-Globe valve

900psi-8"/5"
Jacketed
Y-Globe valve
with 2 x 3" Drain valves

4500psi-5"/3"
Jacketed
Y-Globe valve
with 3 x 3"+2" Drain valves

300psi-16"/14"
Jacketed
Y-Globe valve
with 2 x 3" Drain valves

1500psi-5"/3"
Jacketed
Y-Globe valve
with 4" Drain valve

300psi-5"/3"
Jacketed
Y-Globe valve
with 2 x 2" Drain valves

Pharmaceutical valves, PTFE coated/lined valves
PTFE COATING, LINING AVAILABLE WITH ASKA VALVES

Bellows sealwith thermometer-Flush Bottom Valve

Ram/Piston Valve

Sampling Valve

Y-Globe Valve

Corrosion- and chemical-resistant- Built-in thermometer (Thermo resistance)
Prevention of impurity adhesion- Flush Bottom Valve with Thermometer
Easy flushing inside valve- Bellows seal
Electrification prevention coating against static electricity explosions
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Diverter Valves: 3-way, 4-way, 5-way, 6-way, 7-way
Diverter valves are fabricated from combinations of Y-valves and are used to change, isolate or
separate flow streams. With one diverter valve, you can get the same functionality as with using
multiple valves, and reduce costs.

Dead Space Free (No Pocket Characteristic
Dead-Space-Free is achieved by the Aska patented rotaryram stem with a concave disc tip.
See illustrations at left
Above is a conventional design with a ram stem with a flatdisc tip. Below is an Aska patented rotary ram stem with aconcave disc tip.
The Aska diverter valve incorporates a patented rotary ram
stem with a concave disc tip. It allows smooth and gentle
polymer flow. As the ram moves from the closed to open
position, it rotates so the tip is properly aligned with theflow path.
Aska recommends the use of its patent diverter valves forpolymer lines used in high temperature, high pressure
processing.
For low temperature, low pressure, we also manufacture
as a standard product the flat-disc-with-ram-type-stem pipe
diverter valve, available at a reasonable cost.

W3Z type
3-way Isolation Valve
150psi-34"/28"x 28"/24"
Flange connection
Jacketed, Electric Motor operated

W6SPY Type
6-way Valve
250K-8"/6" x 6"/4" BW
Jacketed
Manual operation

W5F type
2500psi-6"/4" 5-way Valve
Grayloc® connection
Jacketed
Manual operation

W3A-H type
PN10-10"/8" BW
Jacketed
Manual operation

W3H type
220K-10"/7"x8"/6"BW
Jacketed 3-way Valve
Electric motor operation(control valve)

W4S type
160K-12"/8" x 10"/7"x 6"/4" BW
Jacketed 4-way Valve
Electric motor operation(control valve)

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Other Custom made Special Valves and Products:

300psl-8"/6RF
JACKETED CHANGEOVER

300K-1/2" CO2 OPEN VALVE (Supercritical CO2)

Spray Condenser Probe (at left)
Mounted on wet-type condenser.
Used to scrape built-up condensed polymer out of thevapor inlet nozzle.

SPRAY CONDENSER PROBESTROKE 2000 mm

For details and more examples of our products, please visit our website:
http://www.bb-aska.co.jp
We welcome specific inquiries. Contact us below with the details of your requirements, and will reply
with a quotation. Contact:
Sales Office
ASKA CORPORATION
458-1 Minosho-cho, Yamatokoriyama-shi, Nara, 639-1103, Japan
E-mail: info@bb-aska.co.jp
Tel: +81-743-54-6317, +81-743-54-2455
Fax: +81-743-55-0128
Copyright 2021 Aska Corporation. All rights reserved.

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