Product Name
Graduated Ball Valve Handle — 0–90° Manual Flow Control
Product Summary
A 304 stainless steel graduated handle that turns a standard on/off ball valve into a manual flow control valve — set the opening anywhere from 0° to 90° in 10° steps and secure it with the locking pin.
Fits our own ball valve series — tell us your valve model when ordering.
ISO 9001 · CE · Manufacturer since 1999
Product Description
A standard ball valve is built for all-or-nothing flow. Fit this graduated handle and it becomes a simple manual flow control ball valve: a scale plate marked from 0° to 90° in 10° increments sits under the handle, and a locking pin secures the handle at the notch you choose — 30°, 50°, or any other step.
For simple throttling jobs, this is a far cheaper route than an automated control valve — one 304 stainless steel accessory instead of an actuator, positioner, and wiring.
How the Locking Pin Works
- Set: turn the handle to the angle you need and secure the locking pin in the matching notch on the graduated plate.
- Hold: with the pin engaged, the handle resists pipeline vibration and flow-induced movement in normal service — changing the position takes a deliberate release of the pin.
- Repeat: operators can note a setting (“notch 3”) and return the valve to exactly the same flow after maintenance or flushing.
Key Specifications
| Material | ASTM 304 stainless steel |
|---|---|
| Scale | 0° – 90°, in 10° increments |
| Mechanism | Locking pin on a graduated plate |
| Fits | Our ball valve series — tell us your valve model when ordering |
| SKU | HG-304 |
Ball Valve + Graduated Handle vs. Control Valve
This handle suits manual balancing: jobs where someone sets a flow rate once and the system holds it. If your process needs continuous automatic adjustment, that is control-valve territory — but for filling, cooling, or mixing lines that just need a repeatable setting, the graduated handle does the job at a fraction of the cost.
Where It Is Used
- HVAC balancing — regulating hot and cold water flow to coils.
- Mixing lines — manually setting the ratio between two fluids.
- Process control — holding a constant flow rate for filling or cooling.
Which Handle Do You Need?
| Handle | Pick it when |
|---|---|
| Graduated handle (this page) | You need to throttle flow and lock the valve at a repeatable position. |
| Lockable handle | The valve must be padlocked for lockout/tagout. |
| Oval handle | You want a comfortable, glove-friendly grip for frequent operation, or a replacement handle. |
| Extended handle | The valve sits on insulated pipe and the grip has to clear the insulation. |
| Butterfly handle | You prefer a compact stainless T-shaped grip. |
Frequently Asked Questions
Can a ball valve really be used for flow control?
For simple manual throttling, yes. The graduated plate lets you set a partial opening and secure it with the locking pin. For processes that need continuous, automatic adjustment, use a dedicated control valve — this handle is the low-cost answer for set-and-hold applications.
What are the scale increments?
The plate is marked from 0° to 90° in 10° increments, so the valve locks at any of the ten positions.
Which valves does it fit?
Our own ball valve series. The handle is made to match our valve stems, so we do not guarantee fit on other brands’ valves — include your valve model when ordering.
Is this the same as a memory stop?
It covers the same need and more. A memory stop limits the handle to one preset position; the graduated handle locks at any 10° step and lets you return to a recorded setting whenever you want.
Will vibration shift the valve position?
The locking pin secures the handle in the plate notch, so the setting resists pipeline vibration and flow pressure in normal service. Changing the position takes a deliberate release of the pin by the operator.
How do I get a price?
Send us the quantity and the valve model the handle is for. We reply to every inquiry within 24 hours.
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.
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.