ポンプから医療機器まで幅広い商材を取り扱う機械専門商社 ジャパンマシナリー株式会社

LANGUAGE:
日本語
English
お問い合わせ・資料請求
ホーム > 製品情報 > EXTRU – The reliable melt pump for extrusion

EXTRU – The reliable melt pump for extrusion WITTE Pumps

特徴

The EXTRU is mainly used in conjunction with extruders or kneaders. It reduces the natural pulsation and irregular conveyance, particularly in single-screw extruders, added to which, the build up of pressure in the gear pump is more efficient in comparison to the extruder. Because of this, less energy or heat is transferred into the polymer and the product is conveyed in a gentle manner. The EXTRU melt pump is indispensable for the manufacture of precision films or micro granulate.

The robust construction and low wear materials make the EXTRU indispensable for extrusions. Special versions are available for conveying natural rubber and soft PVC. The WITTE quick colour change version lends itself particularly to master batch applications with frequent changes of colour.

In order to prevent the extrusion pump's drive shaft from being driven/pushed out of the housing when there is a high pressure on the suction side (extruder conveying pressure), the drive shaft must be relieved. It protrudes from both sides of the housing and is sealed, so that atmospheric pressure predominates on both sides of the drive shaft. The shaft is thus relieved.

お問合せ

仕様

Melt pumps different versions


Melt pump EXTRU II -
round version
Melt pump EXTRU III -
edge design
Melt pump - quick color change version
for masterbatch applications

Technical Features

Housing

Heat resistant carbon steel, e.g. 1.6582 · rust-free stainless steel 1.4313 · with optional coating


Gears

Tool steel · nitrated steel · special steel · with optional surface coating · helical gearing · herringbone gearing (for extremely low-pulsation conveyance)


Friction Bearings

Tool steel · NiAg (nickel-silver) · Al-bronze · special materials · with optional surface coating


Shaft Seal

Viscoseal · stuffing box


Heating Systems

Electrically with heating cartridges · optional cover heating

Operating Parameters

Viscosity

up to 40000 Pas


Temperature

up to 400°C (752°F)


Inlet pressure

Up to max. 120 bar (1740 psig)


Differential Pressure

Up to 250 bar (3625 psig) · special models also available for higher pressure differentials

The values listed are maximum values and must not coincide under certain circumstances.


Pump Sizes

From 22/22 (4.7 cm3/U - 10 kg/h) up to 280/280 (12000 cm3/U). Intermediate sizes, with narrower gear wheels for higher differential pressure, are possible, e.g. 140/90 (690 cm3/U).


Application Examples

● PS ● PET ● PVC ● PC ● PMMA ● HDPE ● LDPE ● LLDPE ● PP ● PEEK


Polysulphones


Food industry

Liquorice · chewing gum


Type of Seals

Viscoseal (VS)

The viscoseal is the standard seal for WITTE EXTRU and BOOSTER pumps. This is a dynamic seal for high viscosities and suction pressures. It can be provided with heating or cooling. The dynamic seal is suitable for high pressures and temperatures. Its range of use is limited by the suction pressure and the viscosity of the medium being conveyed (at least 10 Pas). The viscosity can be increased by an additional cooling system if necessary.


max. temperature: 450°C (850°F)

Viscosity: 10000 to 40000000 mPas (cP)

Stuffing Box

The stuffing box is a simple (static) seal for WITTE gear pumps. It can be provided with buffering if so desired. The range of application is similar to that of the viscoseal. The standard material used for the packing rings is made of expanded pure graphite with structural textile fibes. But it goes without saying, that other materials are also available.


max. temperature: 350°C (660 °F)

Viscosity: up to 40000000 mPas (cP)



03-3730-5991 お問合せ

 カタログのダウンロードを希望される方はこちらをご入力ください。
 [必須]  (例)日本
 [必須]  (例)太郎
 メールアドレス[必須]   (例)[email protected]
 会社名[必須]
 郵便番号[必須]  (例)123-0001
 都道府県[必須]
 住所[必須]
 電話番号[必須]  (例)03-123-0000
 コメント

購入ご検討段階から納入後のトラブル対応まで、経験豊富なスタッフが確かな技術力でお客様のご要望にお答え致します。まずは是非一度お気軽にご相談ください。

サポート

製品ピックアップ

すべて

prev next

展示会・イベント

詳細へ

国内で開催される様々な展示会・イベントで製品をご覧頂けます。


JFES

  • 製品カタログ ダウンロード
  • 製品カタログ ダウンロード
  • 製品カタログ ダウンロード
お問い合わせ・資料請求

Copyright© JAPAN MACHINERY Co., Ltd. All rights reserved.