HORA control valves and actuation systems

Industrial control valves HORA (Germany): Standard/Heavy Duty control valves, steam conditioning valves, desuperheaters, automatic recirculation valves ARV, and valve actuators.

HORA: control valves and actuator actuation systems

German manufacturer Holter Regelarmaturen GmbH & Co. KG has engineered advanced control valves, steam conditioning units, and industrial actuators for power generation plants, chemical processing industries, and modern building automation networks for over fifty years.

Over five decades of German valve engineering expertise and precision craftsmanship
Advanced manufacturing facilities and testing benches in Schloss Holte-Stukenbrock
Specialized divisions for power technology, process systems, and building automation
Accurate engineering component selection matching original plant nameplate ratings

Shut-off and control valves in Standard, Heavy and Severe Duty

HORA control valves are built across three duty tiers to regulate fluid and gas flows. The portfolio covers operating pressures up to PN 630 and temperatures ranging from -50 °C up to +620 °C, ensuring stable fluid control under challenging plant duties.

Standard Duty units handling differential pressures up to 4 bar and 350 °C
Heavy Duty design built for nominal pressures up to PN 250 and severe flows
Severe Duty forged bodies rated up to PN 630 and extreme temperatures of 620 °C
Multi-stage anti-cavitation trim geometries preventing erosion from fluid flashing

Steam converting valves and pressure reduction assemblies

Combined HORA steam converting valves perform simultaneous pressure reduction and steam cooling within a single compact body. They feature integrated orifice tubes, atomizers, or injection lances engineered for operating temperatures reaching up to 550-620 °C.

Combined throttling and coolant injection within an integrated valve shell
Integrated internal orifice tube ensuring uniform fluid vaporization kinetics
High-precision atomizing nozzles maintaining stable steam outlet temperatures
Forged heat-resistant alloys delivering durability across power turbine loops

HORA desuperheaters and water injection systems

HORA desuperheater assemblies are engineered for precise temperature reduction of superheated steam across power and industrial piping. The portfolio comprises multiple nozzle units, steam-assisted atomizers, injection lances, and Venturi coolers for diverse flow rates.

Multiple nozzle desuperheaters designed for low and medium pressure steam lines
Steam-assisted atomizers providing fine droplet distribution over wide turndowns
Venturi desuperheaters promoting rapid vaporization within compact pipe spools
Minimized thermal fatigue on pipe inner walls via thorough droplet evaporation

Automatic recirculation valves for boiler pump protection

Self-acting HORA automatic recirculation valves safeguard high-pressure centrifugal feed pumps against overheating and destructive cavitation. The assembly integrates a main line non-return disc with an automatic bypass trim for smooth minimum flow relief.

Self-acting mechanical modulation driven directly by primary fluid throughput
Integrated non-return check disk protecting pumps against reverse flow surges
Multi-stage decompression bypass preventing cavitation during flow bypass
Durable protection for boiler feedwater pumps across cold startups and trips

HORA electric, pneumatic and hydraulic valve actuators

HORA actuator offerings feature electric linear drives delivering forces up to 25 kN, pneumatic diaphragm units with return springs, and hydraulic piston cylinders developing up to 2000 kN. The drives ensure precise positioning of critical industrial valves.

Electric linear actuators MC and e-series providing forces reaching up to 25 kN
Pneumatic diaphragm drives equipped with fail-safe mechanical return springs
Hydraulic piston actuators developing up to 2000 kN for heavy severe-duty loops
Digital microprocessor positioners supporting HART and industrial fieldbuses

Engineering standards and fluid control heritage of HORA

German industrial manufacturer Holter Regelarmaturen GmbH & Co. KG has developed high-precision control valves, integrated steam conditioning units, and robust actuators for over fifty years.

Founded by mechanical engineer Georg Holter in Schloss Holte-Stukenbrock, the enterprise merged Westphalian precision machining traditions with the rigorous safety demands of power plant engineering.

The modern HORA manufacturing facility houses multi-axis CNC machining centers, automated plasma stellite hardfacing equipment for seat trim surfaces, and computerized pressure testing stations.

The enterprise operates under an ISO9001:2015 quality management framework, environmental standard ISO14001, and the European Pressure Equipment Directive PED 2014/68/EU.

Industrial shut-off and control valves across duty tiers

HORA control valves are organized into three distinct duty classes to align precisely with industrial fluid power demands. The Standard Duty series serves HVAC loops and general industrial lines with differential pressures up to 4 bar and operating temperatures up to 350 °C.

The valve bodies are produced from ductile iron or carbon steel with hydrodynamically refined flow contours.

The Heavy Duty and Severe Duty series accommodate extreme process media: pressures reaching PN 250 and PN 630 alongside superheated steam temperatures up to 620 °C.

These assemblies employ forged heat-resistant alloy steels and multi-stage anti-cavitation trim geometries that prevent seat erosion and acoustic vibration when throttling severe pressure drops.

Steam conditioning valves and pressure reduction assemblies

HORA steam conditioning valves integrate rapid steam throttling and precise desuperheating into a single monolithic valve body.

This combined architecture replaces cumbersome multi-valve reduction loops, saving valuable installation envelope inside boiler buildings while cutting convective heat losses across extensive interconnecting pipe spools.

The assembly features a perforated throttling orifice tube and high-performance atomizing nozzles for cooling water injection.

The water spray enters directly into the zone of peak steam turbulence immediately behind the throttling cage, ensuring instantaneous droplet evaporation without impingement and safeguarding the integrity of downstream header walls.

Precision desuperheaters and water injection cooling systems

For independent temperature regulation within intermediate boiler reheaters and turbine steam leads, HORA manufactures a versatile line of desuperheating devices.

Multiple nozzle desuperheaters feature radially positioned spring-loaded atomizers with variable throat areas, maintaining uniform droplet atomization even across minimum coolant injection flow rates.

Steam-assisted units harness the kinetic energy of high-pressure auxiliary steam to shatter cooling condensate into a dense micro-droplet mist.

Venturi throat models create localized flow acceleration that boosts vaporization kinetics, keeping steam delivery temperatures within tight limits of ±1 °C relative to target process setpoints.

Automatic recirculation valves for boiler feedwater pump protection

Self-acting HORA automatic recirculation valves provide direct mechanical protection for high-pressure centrifugal boiler feed pumps.

Whenever feedwater consumption drops below safe operating thresholds, the valve prevents hazardous fluid overheating, flashing, and severe cavitation wear on pump impellers, mechanical seals, and shaft bearings.

An internal non-return check disk mechanically couples with a multi-stage decompression bypass assembly.

As boiler demand recedes, the bypass automatically modulates open, venting a regulated minimum fluid flow back into the deaerator or storage tank without requiring external electrical instrumentation, flow transmitters, or motor operators.

Electric, pneumatic and high-power hydraulic valve actuators

To actuate industrial control valves, HORA produces a complete spectrum of actuator technologies. Electric linear actuators of the MC and e-series generate thrust forces between 0.5 and 25 kN.

They feature microprocessor controllers with automatic stroke calibration, precision digital positioning, and mechanical fail-safe return springs.

Pneumatic diaphragm drives equipped with rolling diaphragms and preloaded spring assemblies deliver rapid emergency shut-off upon loss of pilot air pressure.

For heavy severe-duty power station bypass valves, HORA provides hydraulic piston actuators generating positioning forces up to 2000 kN with sub-second response times.

HORA and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of HORA and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.