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Why KK Series Compact Electric Actuators Dominate Small Valve Automation
KK Series compact electric actuators are the preferred choice for small ball valves (DN15–DN65) and butterfly valves (DN25–DN100) due to their:
Space-efficient design – ideal for tight skid-mounted installations
Precise positioning – with 0–90° rotation and adjustable stroke limits
Low maintenance – no air lines, filters, or dryers required
Energy efficiency – only consume power during operation
Easy integration – with PLC, SCADA, and building management systems
Robust construction – aluminum alloy housing with corrosion-resistant coating
Key Selection Criteria for Small Valve Actuators
Before reviewing KK Series models, consider these high-search-volume factors:
| Parameter | Why It Matters |
|---|---|
| Torque Output | Must match valve breakaway and running torque at rated pressure |
| Mounting Interface | ISO 5211 (F03, F04, F05, F07) ensures direct bolt-on fit |
| Supply Voltage | 24V DC, 110V AC, 220V AC – choose based on site availability |
| Control Type | On/Off, Modulating (0–10V / 4–20mA), or BUS communication |
| Duty Cycle | Typically 25%–50% for intermittent use; 100% for continuous modulation |
| Enclosure Rating | IP67 for outdoor/washdown; IP54 for indoor dry areas |
| Ambient Temperature | -20°C to +70°C standard; extended ranges for extreme sites |
| Manual Override | Handwheel or hex-key for emergency operation |
| Feedback Signals | Dry contacts, potentiometer, or absolute encoder |
| Cycle Time | 5–30 seconds per 90° – faster for frequent cycling |
KK Series Overview – Tailored for Small Ball & Butterfly Valves
The KK Series is engineered specifically for quarter-turn valve automation. It combines compact dimensions with high torque density, making it the ideal electric actuator for small ball valves and butterfly valves in space-constrained installations.
Core features across all KK models:
Die-cast aluminum housing, powder-coated for corrosion resistance
Visual position indicator (open/closed)
Manual override with hex key or handwheel
Dual limit switches with adjustable cams
Over-torque protection via thermal overload
Simple wiring with terminal block access
KK Series Model Breakdown (Torque & Fitment Guide)
| Model | Torque Output (Nm) | Mounting Flange (ISO 5211) | Voltage Options | Control Type | Best Matched Valve |
|---|---|---|---|---|---|
| KK-05 | 5 Nm | F03, F04 | 24V DC / 110V AC / 220V AC | On/Off, Modulating | Ball valve DN15–DN25, Butterfly DN25–DN40 |
| KK-10 | 10 Nm | F04, F05 | 24V DC / 110V AC / 220V AC | On/Off, Modulating | Ball valve DN20–DN32, Butterfly DN40–DN65 |
| KK-20 | 20 Nm | F05, F07 | 24V DC / 110V AC / 220V AC | On/Off, Modulating | Ball valve DN32–DN50, Butterfly DN65–DN80 |
| KK-35 | 35 Nm | F05, F07 | 24V DC / 110V AC / 220V AC | On/Off, Modulating | Ball valve DN50–DN65, Butterfly DN80–DN100 |
| KK-50 | 50 Nm | F07 | 24V DC / 110V AC / 220V AC | On/Off, Modulating | Ball valve DN65–DN80, Butterfly DN100 |
| KK-60 | 60 Nm | F07 | 110V AC / 220V AC | On/Off, Modulating | Ball valve DN80, Butterfly DN100 (high pressure) |
Control Signal Options for KK Modulating Versions
| Signal Type | Pros | Cons | Best Use Case |
|---|---|---|---|
| 0–10V DC | Simple, widely available | Susceptible to voltage drop over long cables | Panel-mounted controllers |
| 4–20mA | Noise-immune, loop-powered | Requires dedicated analog output | Remote field wiring > 30m |
| Modbus RTU | Digital, multi-drop, diagnostics | Higher initial setup cost | DCS / PLC networks |
KK Series Technical Specifications (All Models)
| Parameter | KK-05 | KK-10 | KK-20 | KK-35 | KK-50 | KK-60 |
|---|---|---|---|---|---|---|
| Rated torque (Nm) | 5 | 10 | 20 | 35 | 50 | 60 |
| Max cycle time (90°) | 8s | 10s | 15s | 20s | 25s | 30s |
| Duty cycle | 50% | 50% | 50% | 50% | 50% | 25% |
| Enclosure rating | IP67 | IP67 | IP67 | IP67 | IP67 | IP67 |
| Motor power (W) | 10 | 15 | 25 | 40 | 60 | 90 |
| Weight (kg) | 1.2 | 1.5 | 2.2 | 3.0 | 4.5 | 6.0 |
| Ambient temp | -20°C~+70°C | -20°C~+70°C | -20°C~+70°C | -20°C~+70°C | -20°C~+70°C | -20°C~+70°C |
| Manual override | Hex key | Hex key | Handwheel | Handwheel | Handwheel | Handwheel |
| Feedback | Limit switches | Limit switches | Limit switches | Limit switches | Limit switches | Limit switches |
Installation Best Practices for Reliable Operation
To maximise KK Series actuator life and valve performance, follow these high-CPC tips:
Mounting alignment – Use the correct ISO coupling and bracket. Misalignment increases torque demand by 20–30%.
Limit switch setting – Always set travel limits after mounting, never before, to avoid internal gear damage.
Cable gland sealing – Use IP-rated glands; moisture ingress is the #1 cause of premature failure.
Power supply quality – For modulating actuators, use a clean, regulated 24V DC supply to avoid signal noise.
Duty cycle management – If cycle frequency exceeds 10 starts/hour for KK-50/KK-60, consider reducing frequency or selecting continuous-duty version.
Ivan (Mobile:+86-18968769287)
WhatsApp：+86-13579991606
Wechat:+86-18968769287
Website：www.kinko-flow.com
ZHEJIANG KINKO FLUID EQUIPMENT CO.,LTD
info@kinko-flow.com
+86-133 5611 9006
