Pneumatic Actuated Valve Manufacturer in India

Speciality Valve supplies pneumatic actuated valves engineered for reliable on/off and modulating control across oil & gas, power, water, chemical, marine, mining, and HVAC services. We size each package (valve + actuator + controls) to your torque/thrust, differential pressure, temperature, and media—delivering complete, field-ready solutions.

What We Automate

Quarter-turn

• Ball: floating, trunnion, 3-piece, 3-way/4-way, V-port/segment ball
• Butterfly: concentric (resilient), double-offset (high-performance), triple-offset (metal-seated)
• Plug: sleeved plug, eccentric plug

Linear / control

• Globe control valves: single-seat, cage-guided, angle-body, Y-pattern
• Angle-seat / piston valves (fast-cycle utilities, steam, CIP)
• Diaphragm valves: weir and straight-through
• Pinch valves (slurry/solids)
• Knife gate valves (slurry, pulp, wastewater)

How It Works

Instrument air drives a rack-and-pinion or scotch-yoke actuator for quarter-turn movement, or a diaphragm/piston cylinder for linear stroke. For on/off service, a solenoid pilots the actuator and limit switches confirm end-of-travel. For modulating control, a smart positioner converts a 4–20 mA or 0–10 V signal (or digital bus) into precise valve position with diagnostics.

Advantages

• Fast, repeatable strokes with high cycle life
• Spring-return fail-safe or double-acting configurations
• Compact ISO/NAMUR interfaces for easy maintenance and upgrades
• Compatible with corrosive, abrasive, high-temperature, and slurry duties (correct trims/liners)
• Low fugitive-emission packing options available

Actuator Details

Rotary Actuators (Ball / Butterfly / Plug)

• Mechanism: rack-and-pinion (compact) or scotch-yoke (high torque/large sizes)
• Duty: on/off or modulating (with positioner)
• Action: double-acting or spring-return (fail-open/fail-close)
• Interfaces: ISO 5211 drive; VDI/VDE 3845 (NAMUR) accessory pad

Linear Actuators (Globe / Angle-Seat / Knife Gate)

• Types: diaphragm (spring-opposed) for precision; piston cylinder for high thrust
• Options: stroke limiters, air lock-up relay (air-fail state), volume boosters for high speed, manual handwheel override
• Interfaces: IEC/EN 60534-6-1 for control valves

Air & Environment

• Supply pressure: typically 5.5–8 bar (80–116 psi) clean, dry air
• Air quality: ISO 8573-1 class appropriate for positioners/solenoids
• Enclosures: IP66/67 switchboxes/positioners; corrosion-resistant coatings; hazardous-area options when specified

Controls & Instrumentation

Positioners (Modulating Duty)

• Smart electro-pneumatic positioners with auto-calibration and diagnostics
• Input signals: 4–20 mA or 0–10 V; optional HART, Profibus-PA, Foundation Fieldbus
• Functions: split-range, characterization, tight-shut-off logic, valve signature

Limit Switch Boxes (End-of-Travel Feedback)

• Cam-operated SPDT/DPDT microswitches or NAMUR inductive proximity sensors
• High-visibility beacon; IP66/67; explosion-proof variants when specified
• Optional continuous position transmitter (4–20 mA)

Solenoids, Air Prep & Accessories

• Solenoid valves: NAMUR-mount or inline; 24 VDC or 110/230 VAC; Ex d/Ex ia options
• Air preparation: filter-regulator (AFR) with gauge; add coalescer for oil removal if needed
• Performance accessories: volume booster, quick-exhaust valve, lock-up relay, positioner air relays

Industries Served

• Oil & Gas (process units, tank farms, utilities)
• Petrochemical & Refinery
• Power Generation & Steam Systems
• Water & Wastewater Treatment
• Desalination & Marine
• Chemical & Fertilizer
• District Heating & HVAC
• Pulp & Paper
• Mining & Slurry Handling
• LNG & Cryogenic Utilities (with suitable trims/liners)

Material of Construction (Valve Body)

Cast and forged grades compiled for clarity

Trim & Seats (selected by duty)

• Ball/Plug: 316/316L, Duplex; ENP, HVOF WC-Co/Cr; metal-seated options
• Butterfly disc: 316/316L, Duplex/Super Duplex, Aluminium Bronze C95800; metal-seat (TOV)
• Globe/Angle-seat: 316/316L, hardened trims, stellited seats/cages
• Seats/liners: PTFE, RPTFE, PFA, Devlon, PEEK; resilient (EPDM/NBR/FKM); graphite backups for fire-safe

Technical Specifications (Package)

• Valve standards: API 6D / ISO 17292 (ball); API 609 / EN 593 (butterfly); BS 1873 / API 623 (globe); MSS SP-122 (diaphragm)
• Testing: API 598 / ISO 5208 seat & shell
• Fire-safe (where required): API 607 / ISO 10497
• Fugitive emissions (option): ISO 15848-1 / API 641
• End connections: flanged RF/RTJ, wafer, lug, threaded (NPT/BSP)
• Interfaces: ISO 5211 (quarter-turn), VDI/VDE 3845 (NAMUR), IEC/EN 60534-6-1 (linear)
• Controls: on/off or modulating; 4–20 mA/0–10 V; digital bus protocols on request

Selection Guide

Sizing Checklist (include in enquiry)

• Medium and solids % (if any); min/max temperature and pressure; design ΔP
• Line size and required flow/Cv (or range); leakage class target
• Fail action (FO/FC), required stroke time, duty (on/off or modulating)
• Signal type (On/Off, 4–20 mA, bus); hazardous-area classification if any
• End connection standard; ambient conditions; special coatings/liners if required