In-House Assembly & Testing

Pneumatic control valve + limit switch

ARI-STEVI Smart with limit switch, solenoid & F&R

The ARI-STEVI Smart control valve arrives from ARI with its pneumatic actuator already fitted to the valve body. Our team then adds a limit switch enclosure, a solenoid valve and a filter-regulator, all connected with stainless steel tubing and fittings, as per the customer’s requirement.

The limit switch enclosure houses a proximity-type limit switch that reports the valve’s OPEN/CLOSED position. The solenoid valve controls the compressed air feed to the actuator, and the filter-regulator (F&R) conditions that air supply before it reaches the actuator. The SS tubing connecting these is our own in-house work, built to the customer’s requirement.

Assembled & Tested

Limit switch, solenoid valve and F&R fitted and wired in-house, per requirement
Air lines connected with SS tubing and fittings, not loose factory hose
Function-tested and QC-tagged before dispatch

Two assembled ARI-STEVI Smart control valves showing the pneumatic actuator, limit switch enclosure and solenoid valve, closed position — Actuator, limit switch and solenoid, closed position

Close-up of an assembled ARI-STEVI Smart control valve with QC-passed tag, F&R and DN50 body markings — QC-passed and tagged before dispatch

3-way control valve + electro-pneumatic positioner

ARI-STEVI 450 / 451 3-way with Rotex RTX 1000 L positioner

An ARI-STEVI 450 / 451 three-way control valve body (DN50, PN16–25) fitted with its pneumatic diaphragm actuator, then mounted with a Rotex RTX 1000 L electro-pneumatic positioner in place of an integrated smart unit — assembled and tuned in-house per the customer’s requirement.

The RTX 1000 L positioner takes the 4–20 mA control signal and modulates the air to the actuator so valve stroke tracks the setpoint. We mount the positioner to the actuator yoke, fit the feedback linkage to the stroke indicator, and run the air lines in PU tubing. Its two gauges read supply and output air pressure. The assembly is then stroked across its full range and the positioner zero and span are set before dispatch.

Assembled & Tested

Rotex RTX 1000 L positioner mounted to the actuator yoke and linked to the stroke indicator
Air lines run in PU tubing; positioner supply & output pressure gauges fitted
Full-stroke tested, zero and span set, QC-tagged before dispatch

Assembled ARI-STEVI 450/451 three-way control valve with pneumatic actuator and side-mounted Rotex RTX 1000 L electro-pneumatic positioner at VALVER’s Pune facility — STEVI 450/451 3-way body with RTX 1000 L positioner mounted

Close-up of the Rotex RTX 1000 L electro-pneumatic positioner with its supply and output air pressure gauges and PU tubing — Positioner with supply / output pressure gauges, PU air tubing

Globe control valve + electro-pneumatic positioner

ARI-STEVI 448 with YTC electro-pneumatic positioner

An ARI-STEVI 448 straight-through globe control valve (2½", cast body) with its ARI pneumatic diaphragm actuator, mounted with a YTC electro-pneumatic positioner (Young Tech Co., Korea) and set up in-house per the customer’s requirement.

The YTC positioner converts the 4–20 mA control signal into the air pressure that drives the actuator, with a feedback lever off the valve stem so stroke follows the setpoint. We mount the positioner to the actuator yoke, connect the feedback linkage to the stroke indicator, and run the air lines in PU tubing. Its two gauges read supply and output air pressure. The valve is then stroked over its full range and the positioner zero and span are set before dispatch.

Assembled & Tested

YTC electro-pneumatic positioner mounted to the actuator yoke, feedback lever set to the valve stroke
Air lines run in PU tubing; positioner supply & output pressure gauges fitted
Full-stroke tested, zero and span set, QC-tagged before dispatch

Assembled ARI-STEVI 448 globe control valve with ARI pneumatic diaphragm actuator and side-mounted YTC electro-pneumatic positioner at VALVER’s Pune facility — STEVI 448 globe body with ARI actuator and YTC positioner

Close-up of the YTC electro-pneumatic positioner (Young Tech Co., Korea) with its supply and output air pressure gauges and PU tubing — YTC positioner, supply / output gauges, PU air tubing

Pre-piped steam trap module

CONA ball-float trap station with ARI-FABA bellows-seal isolation

A complete ball-float steam trap module, fabricated and piped in-house: a CONA SC ball-float trap with three ARI-FABA 32.041 bellows-seal globe valves for inlet, outlet and bypass isolation, a VALVER-make strainer ahead of the trap, and all the interconnecting pipework in between built to the customer’s layout.

The trap discharges condensate while holding back live steam; the two FABA valves on the trap line isolate it for servicing, and the third forms a bypass so the line stays in service during maintenance. The VALVER strainer protects the trap seat from pipe scale. FABA valves seal on a metal bellows rather than gland packing, so there is no stem leakage to atmosphere over the life of the valve. We cut, fit and bolt up the spools, elbows and flanged ends as one skid so it arrives ready to drop into the line.

Assembled & Tested

CONA SC ball-float trap with inlet, outlet and bypass isolation on ARI-FABA 32.041 bellows-seal globe valves
VALVER-make strainer fitted upstream of the trap; flanged end connections throughout
Interconnecting pipework fabricated in-house to the customer’s layout, pressure-checked before dispatch

In-House Assembly & Testing

ARI-STEVI Smart with limit switch, solenoid & F&R

Assembled & Tested

The Product Behind This Assembly

ARI-STEVI 450 / 451 3-way with Rotex RTX 1000 L positioner

Assembled & Tested

The Products Behind This Assembly

ARI-STEVI 448 with YTC electro-pneumatic positioner

Assembled & Tested

The Product Behind This Assembly

CONA ball-float trap station with ARI-FABA bellows-seal isolation

Assembled & Tested

The Products Behind This Assembly