Single Acting Failsafe Control Valve Positioner Replace Angular
Stroke C41PY-RSA
Smart valve positioner, straight stroke, single acting, failsafe,
split body anti-high temperature vibration
TORLEO series intelligent valve positioner can have built-in limit
switch, upper and lower limit contact output, to help realize
interlock control. When the valve position contact signal needs to
be added to the interlock control, there is no need to install a
special limit switch device. The basic type and intrinsically safe
type of TOP-5879Fl can directly touch the built-in upper and lower
limit contacts by the valve position stroke feedback rod/shaft to
lead out the limit switch contact signal. The built-in limit switch
module is an optional accessory, provided according to user needs.
Performance indicators
| Item | Indicator |
|---|
| Input signal | 4~20mA or 4~20mA+HART, split-range control can be set |
| Sensor type | N/A |
| Air supply | pressure 1.4~6bar; no oil, no moisture, no dust and dirt |
| Stroke | 0~120º |
| Input resistance | 490 Ω (max.) / 20mA (DC) |
| Electrical interface | NPT1/2 or user customized |
| Pneumatic interface | NPT1/4 |
| Repeatability | ±0.3%F.S. |
| Linearity | ±0.3%F.S. |
| Hysteresis | ±0.3%F.S |
| Sensitivity | ±0.2%F.S |
| Output characteristics | linear, quick opening (25:1, 50:1), equal percentage (1:25, 1:50) |
| Protection class | IP66 |
| Explosion protection | None |
| Safety integrity level | SIL3 |
| Fault state | failsafe
Off power, off signal, off gas, the valve is in the initial state |
| Operating temperature | -30℃~85℃ |
| Material | die-cast aluminum |
| Gross weight | 2Kg |
| Dimensions | 240L*80W*110H (mm) |
Product application field
TORLEO brand TOP-5879F1 series smart valve positioner are used in
conjunction with pneumatic control valves, and are widely used in
metallurgy, power generation, paper-making, environmental
protection and other industries where process control is required.
Typical valve application
Single-acting ball valves, butterfly valves, V-port (V-shaped) ball
valves and damper valves.
Technical features of the product
- Nozzle baffle + symmetrical membrane valve structure, strong
ability to resist dust, moisture and oil;
- Built-in keypad and large LCD screen allow on-site configuration
without a handheld communicator;
- HART communication, modular design, convenient for users to choose
and use;
- Valve position output, modular design, convenient for users to
choose and use;
- Configure linear, quick opening, equal percentage and user-defined
flow characteristics;
- One-touch auto-tuning (One-Touch Smart Calibration) enables quick
installation and intuitive, foolproof on-site commissioning;
- PID compound control algorithm achieves 0.1–0.3% control accuracy.
Selection guide for TOP-5879F1 C series smart valve positioner
Field Engineering & Application Notes
Built-in limit switch: the basic/intrinsically-safe design can embed an upper/lower
limit-contact module actuated directly by the valve-position
feedback rod or shaft, exporting a limit-switch signal for
interlock control without any external limit-switch device.
Space-saving integral build: the all-in-one housing removes the need for a separate switch box
and its wiring.
Single-acting fail-safe: the spring returns the valve to its initial position on failure.
Frequently Asked Questions
Q. How is the limit-switch signal produced?
The feedback rod/shaft directly actuates built-in upper/lower limit
contacts, so no external limit switch is required.
Q. Which valves does this angular model drive?
Single-acting ball valves, butterfly valves, V-port ball valves and
damper valves.
Q. Fail behaviour?
Fail-safe: the valve returns to its initial position on failure.
Q. Signal and travel?
4–20 mA or +HART; 0–120°, single-acting.
Q. Rating?
IP66 / SIL3; integral all-in-one mounting.
Industry Applications & Field Cases
Interlock loops: position-proving where panel space is limited.
Chemical & petrochemical: compact skids needing built-in end-position contacts.
Power & utilities: hard-wired trip matrices on rotary valves.
Water treatment: open/close proving without extra instruments.
Why Choose This Model
Embedding the limit-switch module inside the integral body is the
differentiator: it delivers interlock position feedback with fewer
components, less wiring and a smaller footprint.
Manufactured by Wuhan TORLEO Intelligent Co., Ltd. (since 2012).
Quality Certifications & Documentation
Every unit is supplied with quality certifications and technical
documentation. The product conforms to IP66 ingress protection
(dust-tight and water-jet resistant) and is rated SIL3 (Safety
Integrity Level 3) for safety-instrumented systems, and is produced
under the manufacturer’s quality-management system serving the
petroleum, chemical, metallurgy and power industries. Please
contact us for the latest certificates and the full datasheet.
Product
Brochure 2026.8.24.pdf
Company Qualifications & Profile
Wuhan TORLEO Intelligent Co., Ltd. is a high-end
intelligent-control manufacturer specialising in industrial valves,
serving the petroleum, chemical, metallurgy, power, papermaking,
environmental-protection and pharmaceutical industries as well as
valve manufacturers. A Manufacturer established in 2012, it employs
30+ staff, has served more than 3,000 customers and reports annual
sales of about USD 10 million.
Request a Quote / Technical Support
Confirm your limit-switch and interlock needs — reply within 12
business hours.
Email: torleo@qq.com | Tel / WhatsApp: +86-13387658687
