Product Name
Pneumatic Vacuum Ball Valve – 316 Stainless, ISO-K Flange DN80 / DN100, Full Bore
Product Summary
A pneumatically actuated vacuum ball valve in 316 stainless steel, with an ISO-K flange that clamps straight into a standard line — ISO80 (DN80, 3″) or ISO100 (DN100, 4″). Full bore, −20 °C to +180 °C, double acting or spring return. The actuator bolts directly onto the ISO 5211 pad — no bracket, no coupling. For fore-line and pump isolation, not as a high-vacuum chamber gate.
Request a Quote — reply within 24 hours →
ISO 9001 · CE · Manufacturer since 1999
Product Description
A pneumatically actuated vacuum ball valve in 316 stainless steel, with an ISO-K flange that clamps straight into a standard ISO-K line — no adapter. The air actuator opens and closes it in a fraction of the time a hand-operated valve takes, which is the point: on a vacuum line, the valve is usually the slowest thing in the sequence.
Available in ISO80 (DN80, 3″) and ISO100 (DN100, 4″).
Where This Valve Belongs — and Where It Does Not
A ball valve is not the right valve everywhere in a vacuum system, and we would rather tell you that up front than have it arrive and be wrong.
| Position in the system | What it does there | Is a ball valve right for it? |
|---|---|---|
| Fore-line / roughing line isolation | Between the pump and the chamber, on the roughing or backing line. | Yes — this is what a vacuum ball valve is for. |
| Vacuum pump isolation | Shutting a pump out of the line so it can be serviced or swapped without venting the whole system. | Yes. |
| Gauge isolation | Protecting a vacuum gauge during rough-down or venting. | Yes. |
| High-vacuum chamber main valve | The main gate between a chamber and a turbo pump, holding high or ultra-high vacuum. | No. That is the job of an angle valve or a gate valve, not a ball valve. We will tell you so rather than sell you the wrong thing. |
← Swipe the table to see all columns →
If you are isolating a pump, a fore-line, or a gauge, a ball valve is the straightforward, fast, full-bore answer. If you are gating a chamber at high vacuum, you want an angle valve or a gate valve — a different tool for a different job.
Key Technical Specifications
| Item | Specification |
|---|---|
| Body material | ASTM 316 stainless steel |
| Connection | ISO-K vacuum flange — ISO80 (DN80, 3″) or ISO100 (DN100, 4″) |
| Operating temperature | −20 °C to +180 °C |
| Actuator | Aluminium alloy cylinder, double acting (DA) or spring return (SR) |
| Actuator mounting | ISO 5211 — the actuator bolts straight onto the valve, no bracket or coupling |
| Spring return position | Normally closed or normally open — specify when ordering |
| Service | Automated isolation and sequencing on vacuum lines |
Why a Pneumatic Actuator Here
- Speed: vacuum sequences are timed. A hand valve makes the operator the bottleneck; an air actuator does not.
- Direct mount: the valve body carries an ISO 5211 pad, so the actuator bolts on with no bracket, no coupling, nothing to align.
- Spring return on air loss: an SR unit moves to the position you specified when the air supply goes. Tell us whether that position is open or closed and we will build it that way.
- Full bore: nothing narrows the line, so conductance is not sacrificed to the valve.
Applications
- Vacuum pump isolation — shutting a pump out for service without venting the system.
- Vacuum coating and thin-film deposition — automated line sequencing between process steps.
- Thermoforming — fast vacuum draw and release on a cycle.
- Degassing and drying systems — repeated evacuate/vent cycles under PLC control.
- Food processing — vacuum packing and tumbling lines.
Related: the hand-operated version of this valve is our manual vacuum valve; for diverting between two vacuum lines, see the 3-way vacuum ball valve. KF/NW centering rings are here.
FAQ
Can I use this valve to isolate a high-vacuum chamber?
Not as the chamber’s main valve. A ball valve is the right tool for fore-line and roughing-line isolation, for shutting out a pump, and for protecting a gauge. For gating a chamber at high vacuum you want an angle valve or a gate valve. We would rather say so than sell you a valve that does not fit the job.
What flange sizes are available?
ISO-K in ISO80 (DN80, 3″) and ISO100 (DN100, 4″). The flange clamps straight into a standard ISO-K line — no adapter needed.
Double acting or spring return — which should I choose?
Double acting uses air to open and air to close, and holds its last position if the air supply is lost. Spring return uses air one way and a spring the other, so it moves to a preset position when air is lost. Tell us whether that position should be open or closed and we will build it that way.
What is the operating temperature range?
−20 °C to +180 °C.
Does the actuator need a bracket?
No. The valve body has an ISO 5211 mounting pad, so the actuator bolts straight on — nothing to machine, nothing to align.
Is there a minimum order quantity?
No. We have no MOQ. Tell us what you need and we will quote it.
Sample Policy
We are happy to provide product samples for customers to evaluate quality or conduct testing. The process typically begins with a quotation based on the customer’s specifications.
If the pricing is acceptable, we can offer samples either free of charge or at a cost depending on the product type and availability.
Shipping fees are borne by the customer.
Order Process
After confirming the product requirements and other details with the customer, we will issue a Sales Confirmation for approval. Once confirmed, the customer is required to pay a 30% deposit to proceed with production.
When mass production is completed and the goods pass inspection, the customer must pay the remaining 70% balance before shipment is arranged.
Related Products
FAQ
A. How can I request a quote?
Please provide a detailed inquiry sheet including product specifications, materials, quantities, and any special requirements. We will offer a quotation based on your request.
B. What are your quotation terms?
Our quotations are typically based on FOB terms. However, we can also offer CFR, CIF, or other Incoterms upon request.
C. What is your Minimum Order Quantity (MOQ)?
We have no MOQ. We operate on a made-to-order basis and accept orders of any size — trial orders are welcome. For smaller orders, freight is arranged and borne by the buyer.
D. What are your payment terms?
By T/T – 30% down payment upon order confirmation, and 70% balance before shipment.
E. What is your lead time?
Lead time depends on order quantity and specifications. We will confirm the exact schedule when you request a quote.
Want to know more?
If you’re interested in any of our products or services, simply fill out the form below. Our team will get in touch with you as soon as possible to provide the information you need.