製品名
KF40 Centering Ring – SS304 Inner Ring for ISO-KF Flanges, KF16 / KF25 / KF40 / KF50 (KF-CR)
製品概要
A KF40 centering ring in SS304 stainless steel, CNC machined, also made in KF16, KF25 and KF50. This is the inner ring of an ISO-KF quick-flange joint: it sits between two KF flanges, centers the bore and carries the seal so a KF clamp can pull the connection tight. Supplied as the bare ring, without O-ring; 316 stainless made to order.
ISO 9001 · CE · Manufacturer since 1999 · Made in Taiwan
KF40 Centering Ring in SS304, Also in KF16, KF25 and KF50
A KF40 centering ring is the inner metal ring of an ISO-KF quick-flange joint. Ours is CNC machined from SS304 stainless steel and made in four sizes: KF16, KF25, KF40 and KF50. The ring sits between two KF flanges, centers the bore so the two sides line up, and carries the elastomer seal in its groove. A KF clamp then pulls the two flanges onto the ring and the joint is vacuum tight, with no bolts, threads or welding.
The ring is supplied bare, without O-ring, so you fit the elastomer your process calls for. 316 stainless is made to order. The same ISO-KF flange is used on our KF vacuum valves (NW16 to NW50), so one ring size serves both the valve and the line it sits in.
Which KF Centering Ring Size Do You Need?
KF, NW and DN are three names for the same nominal size. A KF40 centering ring, an NW40 centering ring and a DN 40 ISO-KF centering ring are the same part. Match the ring to the nominal size stamped on your flange or valve.
| Ring | Also written | Nominal bore | Flange OD (ISO-KF) |
| KF16 centering ring | NW16, DN 16 ISO-KF | 16 mm | 30 mm |
| KF25 centering ring | NW25, DN 25 ISO-KF | 25 mm | 40 mm |
| KF40 centering ring | NW40, DN 40 ISO-KF | 40 mm | 55 mm |
| KF50 centering ring | NW50, DN 50 ISO-KF | 50 mm | 75 mm |
Flange outside diameters are the ISO-KF standard values, so the ring mates with ISO-KF flanges and clamps of the same size from any maker.
主な仕様
| 品目 | 詳細 |
| パート | KF centering ring, inner ring only (model KF-CR) |
| 標準 | ISO-KF (ISO 2861) clamped quick-release flange |
| サイズ | KF16, KF25, KF40, KF50 (NW16, NW25, NW40, NW50) |
| 素材 | SS304 stainless steel standard; 316 stainless made to order |
| 製造 | CNC加工 |
| 機能 | 2つのKFフランジ間の穴を中央に位置合わせし、シールを支える |
| Supplied as | Bare ring, without O-ring |
当社のISO 9001品質マネジメントシステムに基づき製造されています。.
How a KF Centering Ring Works
ISO-KF is the small-flange standard for vacuum lines. KF stands for Kleinflansch (small flange) and NW for Nennweite; both refer to the same ISO 2861 dimensions. The two flanges in a KF joint are identical and have no bolt holes. Everything that makes the joint work sits between them: the centering ring, the seal it carries, and the clamp around the outside.
The ring does three jobs. Its stepped profile keys into each flange, so the two sides are held concentric. Its outer groove holds the elastomer seal at the right diameter. And its faces give the clamp something solid to compress the seal against. Close the clamp and the joint is made; open it and the line comes apart in seconds, which is why KF is the usual fitting on pump lines and small vacuum systems.
アプリケーション
- Roughing and foreline plumbing between vacuum pumps and chambers.
- Vacuum system piping, valves and pump ports in the KF16 to KF50 range, from rough to high vacuum service.
- Research and teaching laboratories that build and rebuild small vacuum rigs.
- Temporary test connections for leak detectors and residual gas analysers on a KF port.
- Semiconductor facility subsystems such as exhaust and abatement lines, and freeze-dryer pump connections on KF16 ports.
Need the valve as well? See the 真空バルブ range, including the 空圧式真空バルブ そして、その 3方向真空ボールバルブ on KF NW40/NW50.
よくある質問
Is a KF40 centering ring the same as an NW40 or DN 40 ISO-KF centering ring?
Yes. KF, NW and DN are different names for the same ISO-KF nominal size. KF40, NW40 and DN 40 ISO-KF all take the same ring, with a 55 mm flange outside diameter.
どのようなサイズがありますか？
KF16, KF25, KF40 and KF50, also written NW16, NW25, NW40 and NW50. State the size and quantity when you request a quote.
Does the ring come with an O-ring?
No. It is supplied as the bare stainless ring so you can fit the elastomer your process requires. Any standard ISO-KF O-ring of the same nominal size fits the groove.
What material is the ring?
SS304 stainless steel as standard. 316 stainless is made to order; tell us the size and quantity when you request a quote.
How is it made?
CNC machined from SS304 stainless steel, so the shoulder that locates in the flange bore and the groove that holds the seal are cut to size rather than pressed.
Which clamp does it need?
A standard ISO-KF clamp of the same nominal size. The ring is made to ISO-KF dimensions, so it mates with ISO-KF flanges and clamps of that size from any maker.
Does it fit your KF vacuum valves?
Yes. Our KF vacuum valves use the same ISO-KF flanges in NW16 to NW50, so the ring size that fits the valve also fits the line on either side of it.
最低注文数はいくらですか？
No minimum order quantity. We accept orders of any size, including small trial orders; tell us the sizes you need and we will quote them.
サンプル・ポリシー
お客様の品質評価やテストのために、製品サンプルを喜んでご提供いたします。プロセスは通常、お客様の仕様に基づいたお見積もりから始まります。
価格設定にご納得いただければ、製品の種類や在庫状況に応じて、無料または有償でサンプルをご提供いたします。
送料はお客様のご負担となります。
ご注文の流れ
製品の要件やその他の詳細をお客様と確認した後、承認のための販売確認書を発行します。確認後、30%デポジットをお支払いいただき、生産を開始します。
大量生産が完了し、商品が検査に合格した場合、お客様は出荷手配前に残金70%を支払う必要があります。
関連商品
よくある質問
A.見積もり依頼の方法を教えてください。
製品仕様、材料、数量、特別なご要望を含む詳細なお問い合わせシートをご提示ください。お客様のご要望に基づき、お見積もりをさせていただきます。
B.見積条件は何ですか？
私たちの見積もりは通常、以下の内容に基づいています。 本船渡し条件.しかし、我々はまた、提供することができる CFR、CIFまたはご要望に応じて他のインコタームズ。
C.最小発注量（MOQ）はいくらですか？
MOQ depends on the product. We operate on a made-to-order basis, and trial orders are welcome. For smaller orders, freight is arranged and borne by the buyer.
D.支払条件を教えてください。
T/T - 注文確認時に30%の頭金を支払い、出荷前に70%の残金を支払う。
E.リードタイムはどのくらいですか？
納期は注文数量や仕様によって異なります。お客様からご連絡をいただいた際に、正確なスケジュールをご確認させていただきます。 お見積りをご依頼ください。.
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