Name: O-rings for NW/KF centering ring, viton
Brand: Unbranded
SKU: VOR-V-KF16
Price: 24.0 AUD
Availability: InStock

Taxes and shipping applied at checkout.

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Depending on the pressure on the O-ring, environment and service temperature, O-rings need to be renewed to ensure leak-free seals. Use the O-rings to service the NW/KF connections on your vacuum systems.

Viton is well known for its excellent resistance to heat and to aggressive fuels and chemicals. Used for high vacuum applications, temperature range from -54°C to 250°C. Viton is a registered trademark of DuPont Performance Elastomers.

Silicone is a popular O-Ring material that is commonly red in colour and is used for chemical applications. Made of elastomeric materials made from silicone, oxygen, hydrogen and carbon. Excellent material for static service at extreme (hot or cold) temperatures. Outstanding flex and fatigue life. Very good for ozone and UV radiation as well as for resistance to fungal and biological attack. Limitations: Avoid chlorinated solvents, aliphatic and aromatic hydrocarbons and petroleum oils. Silicones are generally very permeable to gases and have poor physical strength and abrasion resistance. Temperature Range from -85°C to 232°C. LPCVD/Oxidation, Dry Etch, Resist Stripping.

Buna-N, also known as Standard Nitrile, is used for non-critical and low vacuum applications, temperature range from -54°C to 150°C. Excellent resistance to petroleum-based oils and fuels, water and alcohol. Nitrile also has good resistance to acids and bases, except those with a strong oxidising effect. Limitations: Avoid highly polar solvents (Acetone, MEK, etc.) and direct exposure to ozone and sunlight.

Available:

Size	ID [B]	OD	Thickness [A]
KF16	18.5mm	29mm	5mm
KF25	28.5mm	37mm	5mm
KF40	41.5mm	50mm	5mm
KF50	55mm	65mm	5mm

O-ring Materials Comparison Table
Property	Buna-N	Viton^;	Silicone
Common Name	Nitrile	Fluor Elastomere	Silicone Rubber
Tear Resistance	Good	Good	Good
Abrasive Resistance	Good	Good	Poor
Ozone Resistance	Poor	Excellent	Excellent
Weather Resistance	Fair	Excellent	Excellent
Heat Resistance	Fair	Excellent	Excellent
Chemical Resistance	Fair	Excellent	Good
Oil Resistance	Poor	Excellent	Poor
Acid Resistance	Fair	Excellent	Good
Alkali Resistance	Good	Good	Fair
Steam Resistance	Fair	Fair	Poor
Minimum Usable Temperature	-54°C	-54°C	-85°C
Maximum Usable Temperature	150°C	260°C	232°C
Color	Black	Black / Brown	Red
Impermeability	Fair	Good	Poor
Tensile Strength	Good	Good	Poor
Cost	Low	High	Medium

Images are illustrative only. Please check product details before ordering.

Updated: 27-12-2024

Code	Size	Pack Size	Availability*	Price (ex GST)
VOR-V-KF16	KF16	Pack/5	0 in stock (?)	AU $24.00
VOR-V-KF25	KF25	Pack/5	0 in stock (?)	AU $40.00
VOR-V-KF40	KF40	Pack/5	0 in stock (?)	AU $49.00
VOR-V-KF50	KF50	Pack/5	1 in stock	AU $27.00

* Ordering Schedule

This item is available for back-order where 0 stock is listed.
We order from this manufacturer monthly, with an estimated lead time of 1 month.

This is the estimated lead time, based on the average time taken previously to fill orders from this particular supplier.
Lead times are from when we receive your order until when we fill your order. For delivery times, please see shipping information below.

REFUNDS AND RETURNS

Please ask prior to returning any goods.

Defective products should be returned to us for replacement or credit. It is best to contact support with as much detail as possible, including pictures, so we can quickly resolve the issue. ProSciTech Pty Ltd complies with the ACCC guidelines, available here: https://www.accc.gov.au/consumers/consumer-rights-guarantees/repair-replace-refund

If you decide the item purchased does not suit your requirements, you may contact us to see if a return is possible. Some items may not be refunded, so please ask before purchase if you think a return may be necessary. The greater of $15 or 15% re-stocking charge will be levied on materials returned due to an error on the part of the customer. We try to keep this charge minimal, however returns do have a cost to us.

SHIPPING INFORMATION

Shipping and Handling charges are $20 for Australian orders; free for orders over $200.

In-stock items are generally sent same day. Orders are shipped shipped from Townsville, Queensland. Our couriers pick up from 2:30pm, so please place your order in plenty of time for processing and packing if you would like it sent same day. When items are not in stock, your order may be part-shipped. Items on back-order will be sent as soon as they become available.

ProSciTech will choose the courier for your order with consideration for the destination, value of parcel, weight and perishability of contents. It is our concern that our shipments reach you, our customer, rapidly and in good condition. Please contact us if you have any issues with a shipment and we will do our best to resolve it. Please keep in mind however, that our legal responsibility ends when goods are passed to the carrier.

Order Value	Shipping and Handling charges
Greater than $200 - (exceptionally heavy or Dangerous Goods excluded).	Free
Less than $200	$20
Express shipping	$30

Delivery times:

Check your email for tracking details provided at time of shipping for updates of your parcel. We cannot guarantee delivery times, as this is outside of our control. The following are the delivery estimates as given by our couriers.

Regular shipping
Queensland	1-3 business days
Sydney	2-5 business days
Melbourne, Adelaide, Hobart or Canberra	3-10 business days
WA, NT and non-metro areas	4-10 business days
Express shipping
Australia wide	1-2 business days

Urgent Orders:

Please request "Express" if you would like us to upgrade your shipment to express delivery. Providing your order fits in a satchel and/or is under 1kg in weight, we will ship your order either DHL, TNT or Express Post. Larger or heavy orders need a quotation for additional freight costs.

Dangerous goods:

See the table on the page for DG shipment costs by road. Please specify when ordering if you require air service (this can be prohibitively expensive). Please request a quotation. We will charge at cost.

Shipping to New Zealand Destinations

Orders are now shipped 'receipted delivery'.

Charges:

Order Value	Shipping and Handling charges
Greater than $200 - (exceptionally heavy or Dangerous Goods excluded).	Free
Less than $200	$26 Minimum Charge

Heavy items (e.g. benchroll or large quantities of microscope slides) may require an additional freight charge - please ask for a quote.

DANGEROUS GOODS shipped to New Zealand: Dangerous goods will be air-freighted and the freight charge billed at cost. Typically, this will be about AUD $600AUD to New Zealand (Up to 2kg).

Delivery times: by air with signature on delivery, depending on courier, delivery can take 3-14 working days. Customs delays are unpredictable and can extend the delivery. Due to COVID19 delivery times have been extended through the couriers and are out of our control.

Shipping to Rest of World Destinations

Contact us for a quote for shipping.

Delivery times: by air with signature on delivery, depending on courier, delivery can be 7-21 working days. Customs delays are unpredictable and can extend the delivery time. Due to COVID19 delivery times have been extended through the couriers and are out of our control.

DANGEROUS GOODS shipped outside Australia: Not available

GUARANTEE

All products are guaranteed as advertised. Defective products should be returned to us for replacement or credit. Please contact us prior to returning goods.

We endeavour to provide accurate descriptions, illustrations, prices and stock availability, but errors and omissions are possible. All quotations are E&OE (Errors and Omissions Excepted)

LIABILITY

All products are intended for laboratory applications only and the user assumes all responsibility involved in use and handling. We accept no liability for loss or damage resulting from the use or abuse of our products.

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