Products · Actuators & Control Systems
Actuate every valve on your P&ID. Torque-sized. Fail-safe confirmed. ESD battery calculated at quotation.
Electric, pneumatic, hydraulic, and gas-over-oil actuators with digital positioners — ATEX Zone 1, SIL 2/3 per IEC 61511 — for every valve type and every fail-safe requirement. Torque calculation and ESD battery sizing delivered with the quotation, before your purchase order is placed.
STANDARDS & APPROVALS
ISO 5210
ISO 5211
EN 15714
IEC 60529 IP
ATEX 2014/34/EU
IECEx
IEC 61511 SIL
HART 7
FF H1
Profibus PA
NEMA 4X
Why Global Trading for Actuators
The engineering detail that separates actuator supply from actuator selection.
Torque Sizing — Delivered with Every Quotation
Valve torque data sheet, worst-case operating condition (max ΔP at minimum supply), safety factor applied (typically 1.25–1.5×), and actuator output torque confirmed in writing — before your purchase order. Not after the actuator arrives and cannot move the valve.
ESD Battery Calculation — Standard on Battery-Backed Orders
For battery-backed electric ESD actuators, we calculate the battery capacity required for the specified number of full-stroke operations at the minimum ambient temperature. Battery specification confirmed at quotation stage with replacement interval recommended.
SIL-Rated Final Element Packages — PFD at Quotation
SIL 1/2/3 actuated valve packages (valve + actuator + solenoid) with combined PFDavg for the final element assembly. Partial stroke test (PST) configuration and coverage percentage documented. SIL certificate from TÜV or Exida supplied at the quotation stage.
ISO 5210/5211 Mounting — Coupler Confirmed Before Order
Actuator mounting flange (ISO 5210 multi-turn / ISO 5211 quarter-turn) and stem coupler profile (square, rectangular, or keyed) confirmed against the valve manufacturer's top-works drawing before the actuator is ordered. Custom brackets and couplers where ISO standard mounting is not available.
Actuator Types
Six actuator technologies. Sized to your valve. Matched to your fail-safe requirement and power supply.
Actuator Type 01 — Electric Multi-Turn
Electric multi-turn actuators for gate, globe, and rising-stem ball valves.
AC or DC electric motor driving a multi-turn output shaft through a spur or worm gearbox — for rising-stem gate valves, globe valves, and multi-turn ball valves. Integral controls with open/close/stop commands, local/remote selector, torque and travel limit switches, and position transmitter (4–20 mA or potentiometer). HART 7, Foundation Fieldbus, or Profibus PA field communication for DCS integration and remote diagnostics. Battery backup module for fail-safe operation on power loss. Stainless steel enclosure or aluminium with IP67/IP68 rating for coastal and offshore installations. Data logger recording torque signature for valve condition monitoring.
ATEX II 2G
IP67/IP68
HART 7
Battery ESD
SIL 2
Our supply standard
Three deliverables on every actuator order that most suppliers ask you to calculate yourself.
01
Torque sizing calculation — with safety factor — before the PO
We obtain the valve manufacturer's torque data sheet — covering breakout torque, running torque, and closing torque at maximum differential pressure and minimum stem packing load. We apply a safety factor of 1.25 to 1.5× on the maximum breakout torque (per the actuator manufacturer's sizing methodology) and confirm that the selected actuator output torque, at the specified minimum supply pressure (pneumatic) or minimum voltage (electric), exceeds the required valve torque with the full safety factor applied. This calculation is delivered as a formal one-page sizing sheet with the quotation. If the calculation fails on the first actuator selection, we go back to the catalogue and propose an alternative before the quotation is issued. Not after you install the actuator and find it cannot move the valve.
Min supply pressure
Max ΔP condition
SF 1.25–1.5×
02
ESD battery calculation — number of operations at minimum temperature
For battery-backed electric actuators in ESD service, the battery capacity must be sufficient to complete the specified number of full-stroke ESD operations at the minimum ambient temperature specified for the installation — because battery capacity decreases significantly at low temperature, and a battery sized at 20°C may not complete even one ESD operation at −20°C. We calculate the energy demand per ESD operation from the actuator's load (valve breakout torque × stroke) and motor efficiency, multiply by the required number of operations, derate for the minimum temperature, and confirm the battery type and capacity that meets the requirement. Battery specification, replacement interval, and temperature derating are confirmed in writing with the quotation.
Per operation energy
Temp derating
Replacement interval
03
SIL final element package — PFD at quotation, PST configuration documented
For SIL-rated ESD applications, the SIL certificate must cover the complete final element — valve, actuator, and solenoid — not just one component. We supply the combined SIL assessment from a notified body (TÜV or Exida) giving the final element PFDavg at the specified proof test interval, the diagnostic coverage achieved by partial stroke testing (PST), the PST configuration for the positioner or limit switch box, and the common cause failure (CCF) factor β for redundant configurations. The SIL documentation is provided at the quotation stage. Your SIS engineer can verify SIL compliance at the Safety Instrumented Function level before the purchase order is placed — not during site acceptance testing when it is too late to change the specification.
TÜV / Exida
Final element PFD
PST coverage %
Actuator Sizing Process
How we size every actuator — the five-step process we apply to every valve on your line list.
1
Obtain valve torque data
Request valve manufacturer's torque data sheet covering breakout (initial unseating), running, and seating torque at the maximum differential pressure specified for the line. If the valve has already been ordered, we request the data from the valve manufacturer directly or from the end user's project technical authority.
2
Identify worst-case operating condition
For pneumatic actuators: minimum instrument air supply pressure (typically 3.5 bar where normal supply is 5–6 bar). For electric actuators: minimum supply voltage (typically 90% of nominal per IEC 60034). For battery-backed ESD: minimum battery voltage at end of life and minimum ambient temperature.
3
Apply safety factor
Apply safety factor of 1.25–1.5× to the valve maximum breakout torque (the higher value for modulating control valves and critical ESD valves). The safety factor accounts for manufacturing tolerances in both the valve and actuator, and for degradation of the valve packing over time which increases stem friction and breakout torque.
4
Select actuator and confirm output torque
Select the actuator model from the manufacturer's torque table at the identified worst-case supply condition. Confirm that the actuator's rated output torque at the worst-case supply condition equals or exceeds the required valve torque multiplied by the safety factor. For scotch-yoke actuators, verify at both open and close end-of-travel positions.
5
Issue formal sizing calculation
Issue a formal one-page sizing calculation sheet showing: valve tag, valve torque data reference, worst-case supply pressure/voltage, required torque with safety factor, selected actuator model, actuator rated output torque at worst-case supply. Delivered with the commercial quotation for client review before the purchase order is placed.
Why torque sizing matters — the failure mode if you skip it
An actuator that is under-sized for the valve torque will fail to complete its stroke when the valve packing is loaded, the differential pressure is at maximum, or the supply pressure drops below nominal. For an ESD ball valve, this means the valve fails to close in an emergency. For a control valve, it means the process variable cannot be controlled. Both failure modes are preventable by correct sizing. Global Trading provides the sizing calculation as a standard deliverable — not as an optional extra — because the consequences of incorrect sizing are detected too late to correct without cost.
Mounting compatibility — ISO 5211 confirmation before the order
Before the actuator is ordered, we confirm the ISO 5211 mounting flange size (F05 through F40 for quarter-turn) or ISO 5210 stem category (multi-turn) against the valve manufacturer's top-works drawing. The stem coupler profile — square drive, rectangular drive, or round shaft with keyway — is confirmed from the valve dimensional drawing. If the valve does not have an ISO 5211 mounting pad, a custom bracket and coupler are designed, dimensioned, and submitted to the client for approval before fabrication. Bracket and coupler dimensional drawings are issued as part of the actuator package documentation.
Industries & Applications
Actuated valve packages across six industries — each with its own fail-safe requirement and approval framework.
Industry 01
Oil & Gas — Upstream & Pipeline
Wellhead ESD actuated ball valves, pipeline SDV (shutdown valves), and SCSSV (surface-controlled sub-surface safety valves)[cite: 12]. Spring-return pneumatic or gas-over-oil actuators for wellhead ESD where instrument air and power are unavailable[cite: 12]. De-energise-to-trip (DTT) solenoid control with ATEX Zone 1 certification[cite: 12]. SIL 2 rated packages with PST for HIPPS (high-integrity pressure protection systems)[cite: 12].
- Pneumatic spring-return, DTT solenoid, SIL 2 for wellhead ESD[cite: 12]
- Gas-over-oil for remote pipeline valves (no instrument air or power)[cite: 12]
- ATEX II 1G Zone 0 for wellhead zone classification[cite: 12]
- ESD battery backup for electric actuators in offshore applications[cite: 12]
Industry 02
Refinery & Downstream
Control valve actuators with digital positioners for CDU, VDU, hydrocracker, and HDS unit flow control[cite: 12]. Electric multi-turn actuators for large-bore gate valve remote operation[cite: 12]. SIL 3-rated ESD actuated butterfly valves with redundant solenoid voting (2oo2 DTT) for high-consequence reactor isolation[cite: 12]. Foundation Fieldbus positioners for full digital integration with Honeywell Experion and Emerson DeltaV[cite: 12].
- FF H1 digital positioners for control valves in DCS-controlled units[cite: 12]
- SIL 3 ESD packages: 1oo2 solenoid voting, combined PFD documented[cite: 12]
- Electric multi-turn for gate valve MOV (motor-operated valve) remote control[cite: 12]
- ATEX Zone 1, stainless enclosure for corrosive atmosphere near process[cite: 12]
Industry 03
LNG & Gas Processing
Cryogenic valve actuators for LNG liquefaction trains and receiving terminals[cite: 12]. Stainless steel enclosures with low-temperature lubricants rated to −60°C ambient[cite: 12]. Spring-return pneumatic actuators for fast-acting BOG (boil-off gas) control valves[cite: 12]. Cryogenic electric actuators with heaters to maintain internal temperature above the minimum lubricant rating[cite: 12]. High-torque scotch-yoke actuators for large-bore cryogenic ball valves (24"–56") in LNG loading arm isolation service[cite: 12].
- Cryogenic-rated lubricants, −60°C ambient, SS enclosure[cite: 12]
- Heater provision to maintain actuator internals above −40°C[cite: 12]
- Scotch-yoke pneumatic for large-bore (24"–56") LNG isolation[cite: 12]
- Fast-acting spring-return for BOG pressure control (≤5 second close)[cite: 12]
Industry 04
Power Generation
Electric multi-turn actuators for steam turbine bypass valves, boiler feed control, and condenser isolation[cite: 12]. Modulating electric actuators with PID positioner for drum level control globe valves[cite: 12]. ESD electric actuators with UPS/battery backup for fuel gas isolation on gas turbine trip — valve must close within 10 seconds of turbine trip signal[cite: 12]. Weatherproof stainless steel enclosures for cooling tower and outdoor substation gate valve remote operation[cite: 12].
- Electric multi-turn with VFD for slow-close steam turbine bypass[cite: 12]
- Battery backup ESD: 10-second close on turbine trip — calculated[cite: 12]
- Modulating electric with 4–20 mA HART positioner for drum level control[cite: 12]
- IP68 stainless for outdoor/weather-exposed cooling water valve actuation[cite: 12]
Industry 05
Petrochemical & Chemical
Control valve actuators with digital positioners for reactor feed control, distillation column reflux, and product rundown[cite: 12]. ATEX Zone 1 pneumatic actuators for hazardous area control loops[cite: 12]. GRP (glass-fibre reinforced polymer) enclosures for chlor-alkali and acid environments where aluminium and carbon steel enclosures corrode rapidly[cite: 12]. Diaphragm actuators for hygienic control valves in pharmaceutical and food-grade chemical service[cite: 12].
- GRP enclosure for Cl₂, HCl, and caustic atmosphere[cite: 12]
- Profibus PA positioners for Siemens PCS 7-controlled petrochemical units[cite: 12]
- Diaphragm actuators for hygienic/sanitary control valves[cite: 12]
- Stainless steel trim and PTFE-lined pilot for corrosive control service[cite: 12]
Industry 06
Water Treatment & Utilities
Electric quarter-turn actuators for remote operation of large-bore butterfly valves in water treatment plants and pumping stations[cite: 12]. IP68-rated waterproof actuators for buried-service gate and butterfly valves in municipal water distribution networks[cite: 12]. Modulating actuators for chlorine dosing control valves[cite: 12]. Non-ATEX rated (safe area) actuators for water treatment facilities where hazardous area classification does not apply, reducing cost without compromising function[cite: 12].
- IP68 buried-service electric actuators for municipal distribution[cite: 12]
- Modulating for chlorine dosing and pH control valves[cite: 12]
- Non-ATEX (safe area) for water treatment — cost-optimised[cite: 12]
- Bluetooth configuration for hard-to-access installed actuators[cite: 12]
Standards & Certifications
The actuator, mounting, approval, and safety standards confirmed at specification before every order is placed.
| 🛠️ ACTUATOR & MOUNTING STANDARDS | |
|---|---|
| ISO 5210 | Mounting dimensions for multi-turn valve actuators. Stem categories A, B, C, D, E for rising/non-rising stems. |
| ISO 5211 | Mounting dimensions for part-turn (quarter-turn) valve actuators. F05 through F40 flange categories. |
| EN 15714 | Industrial valves — actuator types and operating conditions. Part 1 (electric multi-turn), Part 2 (electric part-turn), Part 3 (pneumatic). |
| IEC 60529 | Degrees of protection provided by enclosures (IP Code). IP54, IP65, IP66, IP67, IP68 per application. |
| NEMA 4X | US equivalent enclosure rating — watertight, dustproof, corrosion-resistant — used on North American specifications. |
| ⚡ HAZARDOUS AREA APPROVAL | |
|---|---|
| ATEX 2014/34 | EU directive for equipment in explosive atmospheres. Category 1G (Zone 0), 2G (Zone 1), 3G (Zone 2). |
| IEC 60079 | Explosive atmospheres — equipment design, testing, and marking. IECEx system for international recognition. |
| Ex d (IIC) | Flameproof enclosure — most common protection method for electric actuators in Zone 1. IIC for hydrogen service. |
| Ex ia (IIC) | Intrinsic safety — for solenoid valves and positioners in Zone 0 requiring the highest protection level. |
| FM / CSA | Factory Mutual (FM) and Canadian Standards Association (CSA) approvals for North American specifications. |
| 🛡️ FUNCTIONAL SAFETY & CONTROL | |
|---|---|
| IEC 61511 | Functional safety — Safety Instrumented Systems for process industries. Defines SIL requirements for final elements. |
| IEC 61508 | Functional safety of E/E/PE systems. Underlying standard for SIL certification of individual components. |
| HART 7 | IEC 62090 — field communication protocol for positioners and actuators. Device diagnostics from DCS. |
| IEC 61158 | Foundation Fieldbus H1 and Profibus PA — digital field bus for smart positioners and valve controllers. |
| API 6D | Pipeline valves — actuator requirements for ESD ball and gate valves on pipelines per API 6D Annex A. |
Actuated valve packages from Istanbul to the Middle East, Central Asia, and Africa — torque-sized, documented, and ready for installation.
40+
Countries
Actuated valve packages exported to 40+ countries from Istanbul since 2001.
Actuated valve packages exported to 40+ countries from Istanbul since 2001.
5×
Doc ChecksTorque calc · Battery calc · SIL cert · ATEX DoC · ISO 5211 coupler — all confirmed before PO.
SIL3
Max CapabilityFinal element packages with combined PFD from notified body at quotation stage.
24hr
Quotation + SizingTorque calculation returned alongside commercial quotation within 24 hours of inquiry.
Frequently Asked Questions
Questions valve engineers and procurement teams ask before placing their first actuated valve package order.
Actuator sizing requires the valve manufacturer's torque data sheet — covering breakout, running, and seating torque at maximum differential pressure. We apply a safety factor of 1.25–1.5× to the maximum breakout torque and confirm the actuator's output torque at the worst-case supply condition (minimum instrument air pressure or minimum supply voltage) exceeds the required torque with the safety factor applied. The sizing calculation is a formal one-page document delivered with the commercial quotation for client review before the purchase order is placed.
Three fail-safe configurations are available: Fail-Close (FC) — spring pack or battery closes the valve on loss of power or control signal; Fail-Open (FO) — spring pack or battery opens the valve on loss of power; Fail-Last (FL) — valve holds last position on loss of control signal (for modulating control, not recommended for ESD). For spring-return actuators, the spring pack provides fail-safe operation without any external power source — the most reliable ESD configuration. For battery-backed electric actuators, we calculate the battery capacity required to complete the specified number of full-stroke ESD operations at minimum ambient temperature, confirming the battery specification in the quotation.
Yes. SIL 1, SIL 2, and SIL 3 rated actuated valve packages are supplied with the SIL assessment covering the complete final element — valve, actuator, and solenoid valve — not just individual components. The combined PFDavg at the specified proof test interval, diagnostic coverage from partial stroke testing (PST), and CCF factor β for redundant configurations are all documented at the quotation stage. SIL certificates are from notified bodies (TÜV or Exida).
Digital valve positioners are available with HART 7 (4–20 mA + digital), Foundation Fieldbus H1 (31.25 kbps) for Emerson DeltaV and Honeywell Experion, and Profibus PA (31.25 kbps) for Siemens PCS 7 integration. The positioner provides valve position feedback, valve diagnostic data (friction measurement, signature curve, dead band measurement), and partial stroke test (PST) capability from the DCS. Device description files (DD, EDDL, FDT/DTM) for the specific positioner model and DCS platform are supplied with every positioner order.
Every actuated valve package order includes: Torque sizing calculation with safety factor; Actuator data sheet; Solenoid valve data sheet with coil voltage and response time; ESD battery calculation (for battery-backed electric); ATEX/IECEx Declaration of Conformity for the complete package; SIL certificate for the final element assembly where SIL-rated; Partial stroke test configuration and coverage percentage; Wiring diagram (DCS to solenoid, limit switches, and motor); Loop diagram; Functional test certificate confirming stroke time, torque, and position feedback accuracy.
Partial stroke testing (PST) moves an ESD valve through 5–15% of its stroke while the process remains online, verifying the valve and actuator can move without interrupting the process. IEC 61511 requires PST to increase the diagnostic coverage (DC) between full proof tests, improving the achieved PFDavg. PST can be configured in the digital positioner and initiated from the DCS without manual intervention. We confirm the PST coverage percentage achieved for the specified partial stroke travel in the SIL documentation, and provide the PST configuration procedure for the positioner model supplied.
Yes. For cryogenic service (down to −60°C ambient): low-temperature rated lubricants, stainless steel fasteners, and heaters to maintain actuator internals above the minimum lubricant temperature. For high-temperature valve stems (above 200°C), thermal isolation with an insulation spacer and extended mounting bracket prevents heat transfer to the actuator gearbox. We specify the thermal isolation requirement and actuator ambient temperature rating for all high-temperature and cryogenic applications at the quotation stage.
Actuator mounting follows ISO 5210 (multi-turn valves — stem categories A through E) and ISO 5211 (part-turn valves — flange sizes F05 through F40). Coupler profile — square drive, rectangular drive, or keyed round shaft — is confirmed from the valve manufacturer's top-works drawing before the actuator is ordered. Where the valve does not have an ISO 5210/5211 mounting pad, a custom bracket and coupler are designed, dimensioned, and submitted for client approval before fabrication. Dimensional drawings are issued as part of the actuator documentation package.
Documentation — every actuated valve package
Torque sizing calculation with safety factor
ESD battery calculation (battery-backed units)
SIL certificate — final element assembly PFD
ATEX/IECEx Declaration of Conformity
ISO 5211 coupler confirmation drawing
Wiring diagram — DCS to field
PST configuration and coverage %
Functional test certificate
Related Products
Complete the valve automation package from the same supply source.
Valves & Flow Control
Ball, gate, globe, butterfly, check, and PSV to API 6D, API 600, and ASME B16.34. EN 10204 3.1, NACE, ATEX, SIL documentation standard.
Instrumentation & Transmitters
Pressure, temperature, level, flow, and gas detection. HART 7/FF/Profibus PA. SIL 1/2/3. Hookup drawings and loop diagrams per tag.
Rotating Equipment & Pumps
API 610 centrifugal, API 674 triplex, API 675 metering. API 682 seal selection at quotation. Hydraulic duty confirmation included.
NDT & Inspection Equipment
PAUT/TOFD ultrasonic, digital radiographic, MT, ET, PT. ASME V, API 1104, EN ISO. Calibration blocks included with every system.
Submit your valve list for actuation. Torque sizing and quotation returned within 24 hours.
Valve tag · valve type · size · pressure class · end connection · torque data reference (or valve model) · fail-safe requirement (FC/FO/FL) · power supply available · ATEX category · SIL requirement · number of ESD operations · minimum ambient temperature. We size, select, calculate, and quote — with torque calculation delivered alongside the commercial quotation.
Request an Actuator Quotation