A KB31 control valve is a model-coded control valve for regulating fluid and gas flow in process systems.
Send us the full model code and duty. Then we will confirm the matching valve.
What is a KB31 control valve?
A control valve changes its opening automatically to hold a set flow, pressure, temperature or level. An actuator, driven by air, electricity or a self-acting sensor, moves the valve plug in response to a controller.
Steam control valves regulate heating, while water and process control valves hold pressures and levels. Correct sizing is essential, because an oversized valve controls poorly.
Further reading
- Control valves explained (Wikipedia)
- Valve actuators (Wikipedia)
- Steam and its uses (Wikipedia)
Key terms explained
- Actuator
- The part that moves the valve, using air, electricity or a sensor.
- Kv value
- A flow capacity figure used to size control valves.
- Positioner
- A device that sets the valve opening accurately from the control signal.
- PN rating
- Pressure Nominal: the pressure class in bar at reference temperature, such as PN16.
- Class 150 and 800
- American pressure classes. Class 800 is common for small forged steel valves.
- End connection
- How the valve joins the pipe: threaded, flanged, wafer, socket weld or clamp.
Features and benefits
- Automatic flow, pressure or temperature control.
- Pneumatic, electric or self-acting types.
- Suits steam, water and process fluids.
- Flanged and threaded bodies.
Technical specifications
| Product | KB31 control valve |
|---|---|
| Model | KB31 |
| Details | Confirm with quote |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
Sizes, grades and ratings depend on stock and model. Tell us what you need, and we will confirm before you order.
Applications of a KB31 control valve
- Steam heating. Controls steam to heat exchangers.
- Hot water calorifiers. Holds water temperature.
- Boiler feed. Controls feed water level.
- Process heating. Controls tanks and vats.
- Pressure control. Holds line pressure.
- HVAC. Controls coils and zones.
- Water treatment. Controls flows and levels.
- Dairy and food. Controls pasteurizers.
- Laundries. Controls steam to equipment.
- Textile plants. Controls dye bath temperature.
- Chemical plants. Controls process variables.
- Breweries. Controls wort and CIP heating.
How to choose and install
- Size the valve on Kv and flow, not pipe size alone.
- Match the actuator to your control signal.
- Fit a strainer upstream.
- Install isolating valves and a bypass for service.
Why choose Sparks Plumbing Experts
- Valves, flanges and gaskets togetherComplete a pipeline joint with matching valves, flanges, gaskets and bolts.
- Pressure-rated optionsMany items come in PN16, class 150 or class 300 ratings, so you can match the line.
- Stainless and carbon steelChoose stainless for corrosion resistance or carbon steel where it suits the service.
- Plant maintenance sparesKeep critical spares on hand for planned shutdowns and breakdowns.
- Visit or collect in NairobiOur store is at KCB Building, Enterprise Road, in the Industrial Area, so you can see parts before you buy or collect your order.
- Quotes your wayAsk for prices by phone, WhatsApp, email or the online quote form, whichever suits you on site.
- Over 1,600 products in one placeOur catalogue covers 55 categories, so one supplier can handle most of your parts list.
- Help choosing the right partSend a nameplate photo, a drawing or the old part, and we help you match size and specification.
- Single items or project quantitiesWe price a single replacement part just as readily as a full site order.
- Supply across East AfricaWe serve customers across Kenya. We also supply buyers in Uganda, Tanzania, Zanzibar, Rwanda, Burundi, DR Congo, Ethiopia and South Sudan.
Related products and accessories
Browse more: Valves · Flanges · Gaskets · Industrial Piping Systems.
Ordering from Sparks Plumbing Experts
We supply customers across Kenya. We also serve buyers in Uganda, Tanzania, Zanzibar, Rwanda, Burundi, DR Congo, Ethiopia and South Sudan. You can collect from our store at KCB Building, Enterprise Road, Nairobi, or ask us about delivery to your site. Send your quantities and specifications, and we will reply with prices and availability.
Request a Quote WhatsApp 0726 086 895
Frequently asked questions
How do I order a KB31 control valve?
Send the full model code, size and actuator details.
What details do you need to quote control valves?
Tell us the size, end connection, pressure rating, body material and the fluid and temperature. A photo of the old part, a nameplate or a drawing also helps. Then call or WhatsApp 0726 086 895, or use the quote form on this page.
Do you deliver control valves outside Nairobi?
Yes. We supply customers across Kenya. We also serve buyers in Uganda, Tanzania, Zanzibar, Rwanda, Burundi, DR Congo, Ethiopia and South Sudan. Delivery or courier arrangements are agreed when you confirm the order.
How much does a control valve cost in Kenya?
The price depends on the type, size, material, pressure rating and quantity. Therefore, send your list with a quote request and we will reply with current figures.
What does PN16 mean on a valve?
It means a nominal pressure rating of 16 bar at reference temperature. At higher temperatures the allowed pressure is lower, so check the rating table.
Flanged or threaded: which do I need?
Threaded ends suit small sizes, usually up to 2 inch. Flanged ends suit larger sizes and make removal easier.
Why does my control valve hunt?
It may be oversized or the controller is badly tuned.
Can I fit a control valve in any position?
Follow the maker guidance on orientation.
Do control valves need a bypass?
A bypass lets the process run during maintenance.
Where can I buy KB31 control valve in Kenya?
Buy it from Sparks Plumbing Experts Ltd at KCB Building, Enterprise Road, Industrial Area, Nairobi. We are open Monday to Friday, 8 am to 5 pm, and Saturday, 9 am to 12 noon. You can also order by phone or WhatsApp on 0726 086 895. We deliver across Kenya and to Uganda, Tanzania, Zanzibar, Rwanda, Burundi, DR Congo, Ethiopia and South Sudan.
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