Audited Supplier
WELFLOW Sight Glass Flow Indicator
WELFLOW Brand Flow Indicator is committed to helping customers to monitor and verfify the flowing mediums
such as petroleum products,liquefied gases,solvents or hazardous and corrosive chemicals and liquids.Monitoring,
Sensing and Revealing the fluids in operation,to help you keep them under your control for safety and trouble
shooting in economical ways.
Flow Indicators Types are divided into Flapper Flow Indicator,Paddle Wheel Flow Indicator,Floating
Ball Flow indicator and Sight Glass Flow Indicator by our factory.
OEM and Customization Service are based on your various requirements,we will advise and offer suitable
types to you for meeting your needs in different conditions of pressure,temperature,flowing fluid types and
machanical dimensions.
Application Fileds:
I.Power Plants;II.Waste Water Treatment;III.Chemical Industry;IV.Petroleum Industry;V.Manufacturing
Structure & Performance
| Parts | Materials | Max.Pressure or Temperature |
| Body & Covers | 304 Stainless Steel | -112°F to 797°F |
| 316 Stainless Steel | -320.8°F to 1202°F | |
| 316L Stainless Steel | -320.8°F to 1472°F | |
| Windows | Tempered Soda Lime Glass | 232psig@212°F |
| Tempered Borosilicate Glass | 290psig@248°F | |
| Tempered Quartz Glass | 362psig@392°F | |
| Paddle Wheel | Plastic | -22°F to 212°F |
| PTFE(Teflon) | -40°F to 450°F | |
| Sealing Gaskets | NBR | -4°F to 248°F |
| Viton | -13°F to 400°F | |
| PTFE(Teflon) | -40°F to 500°F | |
| Thread Standard | NPT,BSPP,BSPT Female Thread | |
Related Products:
| QUESTION? | ANSWER |
| 1. Are you a factory? | Yes, Welflow is a factory located in Wenzhou, Zhejiang, China. |
| 2. Do you have any requirements of MOQ? | No limited to MOQ but the difference in unit price. |
| 3. Payment Terms | Typically 30% T/T as deposit, 70% against copy of BL/ Or balance L/C at sight. |
| 4. Nearly Sea Port | Ningbo or Shanghai Port |
| 5. Terms: | FOB Ningbo/Shanghai, CIF, FCA, etc. |
| 6. Delivery Time: | Typically, it is 30-35 days after receiving the deposit payment. However, almost all of the items we have stock in 304. |
| 7. Could you accept color Marks or Color Boxes? | Yes, both are acceptable; we have experience with them. |
| 8. Could you accept marking our logo on the products? | Yes, on the handle or the bodies, both are okay. 1. Print on the Handle (NO MOQ requirements) 2. Laser Marking. (NO MOQ requirements) 3. Carvings(NO MOQ requirements) 4. Casting on the bodies (Has MOQ requirements) |
| 9. Do you have Material Certificates? | Yes, if required, Each item will be laser marked with Heat NO. and the material certificates. |
| 10. How do you deal with customer complaints, such as quality issues? | This is an issue we take very seriously. As long as it is confirmed to be a quality issue, we will take full responsibility. 1. exchange or refund is acceptable. It mainly depends on how you need to deal with it. |
Key Parts of Ball Valves
Body: The body of the valve, made from stainless steel, is the outer casing and provides the main structure. It contains the internal parts and has connections (ports) for the pipeline.
Ball: The ball is the central component that controls the flow of fluid. It's a sphere with a hole through the middle, which aligns with the pipeline when the valve is open and is perpendicular to it when the valve is closed.
Stem: The stem is the part that connects the handle to the ball. When the handle is turned, the stem rotates the ball.
Seat: The seats are rings of softer material (often PTFE or another plastic) that form a seal between the ball and the body when the valve is closed. There are typically two seats, one on either side of the ball.
Seals: Seals or packing material are used to prevent leakage along the stem. They ensure that when the valve is closed, no fluid can escape.
Bonnet: The bonnet is a part of the valve body that holds the stem. It's often bolted onto the body and provides a seal to prevent leaks.
