Product Name
Manual 3-Way Vacuum Valve, 316 Stainless – NW/KF Flange, L-Port / T-Port
Product Summary
A 316 stainless manual 3-way vacuum valve — a quarter-turn lever rotates the ball to divert one vacuum pump between chambers or vent a line. NW (KF) vacuum flanges in NW40 (1-1/2″) and NW50 (2″), L-port or T-port, PTFE seats, -20 °C to +180 °C. Polished CF8M body; the same body is available with a pneumatic actuator.
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ISO 9001 · CE · Manufacturer since 1999
PDFNW50 3-WayVacuum · NW/KF · Dimension SheetDownload ↓
Product Description
This manual 3-way vacuum valve switches a vacuum line by hand. A quarter turn of the stainless lever rotates the ball to divert one vacuum pump between chambers, or vent a line. The body is cast 316 stainless steel (ASTM A351 CF8M) with a polished surface and PTFE seats, on NW (KF) vacuum flanges in NW40 (1-1/2″) and NW50 (2″).
The ball is available L-port or T-port — L-port connects one outlet at a time, T-port can connect two outlets together or merge flow. Need it automated? See the pneumatic 3-way vacuum ball valve. For straight (2-way) vacuum lines, see the NW50 pneumatic vacuum ball valve or the larger ISO-K DN80/DN100 pneumatic vacuum valve, or browse all vacuum valves.
L-Port or T-Port?
| L-port | T-port | |
|---|---|---|
| Flow | Connects the inlet to one outlet at a time | Connects two outlets, or merges flow between all three ports |
| Use for | Selecting between two chambers — one pump, one chamber at a time | Combining lines, or diverting while keeping a second path open |
Both are available in NW40 and NW50 — tell us which port pattern you need when you request a quote.
Valve Specifications
| Type | 3-way vacuum valve — manual (lever) |
| Model | V-3WV |
| Sizes | NW40 (1-1/2″) and NW50 (2″) |
| Port | 3-way, L-port or T-port |
| Connection | NW (KF) vacuum flange — clamp and centring ring, no bolts |
| Body & ball | ASTM A351 CF8M — the cast form of 316 stainless steel — polished |
| Seat | PTFE |
| Working temperature | -20 °C to +180 °C |
| Operation | Manual quarter-turn lever with locking plate |
Dimensions (mm)
Body dimensions below. Full drawings in the NW40 and NW50 dimension sheets (PDF).
| Size | L (length) | W (width) | Center distance | Flange ØD | Bore |
|---|---|---|---|---|---|
| NW40 (1-1/2″) | 181 | 175 | 88.5 | Ø55 | Ø38 |
| NW50 (2″) | 181 | 201 | 100.5 | Ø75 | Ø46 |
Application Fields & Locations
- Lab vacuum stations: switch one pump between chambers by hand.
- Composite & vacuum-bag molding: divert vacuum across moulds with a single valve.
- Vacuum pump switching: route one pump across process steps.
- Semiconductor & coating support lines: 316 stainless, polished, clamp-flanged KF piping.
FAQ
What is the difference between L-port and T-port? L-port connects the inlet to one outlet at a time — a selector. T-port can connect two outlets together or merge flow between all three ports. Tell us which pattern you need when you order.
Can it be automated later? Yes — the same body is offered with a pneumatic actuator as the pneumatic 3-way vacuum ball valve. Choose that version if the line is, or may become, automated.
Which sizes and flanges are available? NW40 (1-1/2″) and NW50 (2″), both on NW (KF) vacuum flanges. For larger ISO-K lines, see the ISO-K DN80/DN100 pneumatic vacuum valve.
What material and finish is it? The body and ball are cast 316 stainless steel (ASTM A351 CF8M) with a polished surface, and the seats are PTFE — a clean, low-outgassing combination for vacuum service.
What is the operating temperature? -20 °C to +180 °C, set by the PTFE seats. Body and ball are cast 316 stainless steel with a polished surface.
What is the minimum order? No minimum order quantity — we accept orders of any size, including small trial orders. For small orders, freight is arranged and paid by the buyer. Payment is by T/T — 30% on order confirmation, 70% before shipment.
See all 3-way ball valve models — manual, pneumatic, sanitary & vacuum →
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.
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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.
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