YOOYOUN Co., Ltd.

Safety, reducing and control valves and steam traps made in Busan

LISTEDMANUFACTURER

Busan (Sasang-gu), South Korea

Industrial Valves

About

YOOYOUN manufactures special industrial valves: safety relief valves, pressure reducing and regulating valves, steam traps, control and temperature regulating valves, strainers and other steam-line accessories.

The company was incorporated in October 2000 in Busan and supplies plant, construction, shipbuilding and ship-equipment makers, as well as semiconductor equipment builders.

Its full-bore safety valves carry inspection approval from the Korea Occupational Safety and Health Agency, and the company holds a manufacturing permit for high-pressure gas equipment.

Products

Safety Relief Valves and Vacuum Breakers

Spring-loaded safety relief valves in low-lift, high-lift and full-bore designs for boilers, pressure vessels and pump relief, plus a vacuum breaker. Set pressure is sealed against tampering.

Key features

Low-lift, high-lift and full-bore conventional designs
Set pressures 0.35–33 kgf/cm²
Screwed (PT) and flanged (JIS/ANSI/DIN) ends
Lever, plain or closed caps for steam, air, liquid or gas
Full-bore types certified by the Korea Occupational Safety and Health Agency

Applications

Steam boilers
Pressure vessels and receivers
Pump relief
Instrument and gas lines

15A–200A; 0.35–33 kgf/cm²; up to 220°C

Model	Series	Body material	Pressure	Max. temperature	End connection	Fluid	Sizes
SFL-S1	Low lift	Bronze / stainless steel	0.35–11.0 kgf/cm²	220°C	JIS B0203 PT screwed	Air, gas, steam, water, liquid	15A×20A–50A×50A
SFL-3S	High lift	Bronze / stainless steel	0.5–33.0 kgf/cm²	220°C	JIS B0203 PT screwed	Air, gas, steam, water, liquid	15A×20A–50A×50A
SFL-7S	Low lift (tube fitting)	Stainless steel	0.5–10.0 kgf/cm²	50°C	Lok tube fitting	N2, CDA	1/4"×3/8"–1"×1"
SFF-1F / SFF-2F	Conventional full bore	FCD450 / bronze / SC480 / stainless	0.5–22.0 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Air, gas, steam, water, liquid	15A×20A–200A×250A
SFF-3F	Conventional full bore	FCD450 / bronze / SC480 / stainless	20–33 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Air, gas, steam, water, liquid	15A×20A–200A×250A
VB-1S	Vacuum breaker	Brass	16.0 kgf/cm²	220°C	JIS B0203 PT screwed	Air, steam	15A–20A

Pressure Reducing and Regulating Valves

Direct-acting diaphragm and cylinder reducing valves, pilot-operated steam reducing valves, hydrant (fire water) reducing valves and back-pressure style pressure regulating valves for air, water, oil and steam.

Key features

Direct diaphragm, direct cylinder and pilot designs
Pilot type for steam up to 250A with 10:1 reduction
Hydrant PRVs in globe, angle and piston styles
No external power needed
Bodies in ductile iron, bronze, cast steel or stainless

Applications

Building services and district heating
Factory steam and air lines
Fire hydrant systems
Ships

15A–250A; inlet up to 33 kgf/cm²; up to 220°C

11 models

Model	Series	Body material	Pressure	Max. temperature	End connection	Fluid	Sizes
RDD-1S	Direct-acting diaphragm	FCD450	Inlet 1–10 kgf/cm²	80°C	JIS B0203 taper thread	Air, water, liquid	15A–40A
RDD-1F	Direct-acting diaphragm	FCD450 / bronze / SC480 / stainless	Inlet 2–16 kgf/cm²	80°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Air, water, liquid	15A–100A
RDD-3F	Direct-acting diaphragm	SC480 / stainless	Inlet 33 kgf/cm²	80°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Air, water, liquid	15A–50A
RDST-1S	Direct-acting diaphragm (steam)	FCD450	Inlet up to 10 kgf/cm²	220°C	JIS B0203 thread	Steam	15A–40A
RDC-1F	Direct-acting cylinder	FCD450 / bronze / SC480 / stainless	Inlet 2–16 kgf/cm²	120°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Air, water, liquid, oil	15A–150A
RDP-1F	Pilot-operated	SC480 / FCD450	Inlet up to 20 kgf/cm²; outlet 0.5–8 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Steam	15A–250A
HRD-1F	Hydrant PRV, globe	Bronze	Inlet up to 20 kgf/cm²	80°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water	25A–50A
HRD-1FA	Hydrant PRV, angle	Bronze / aluminium bronze	Inlet up to 20 kgf/cm²	80°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water	40A–50A
HRD-2F / HRD-3F	Hydrant PRV, piston	Bronze	Inlet up to 20 kgf/cm²	80°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water	40A–80A
RGC-1F	Pressure regulating, direct cylinder	FCD450 / bronze / SC480 / stainless	0.5–9 kgf/cm²	120°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Air, water, liquid, oil	15A–150A
RGD-1F	Pressure regulating, direct diaphragm	FCD450 / bronze / SC480 / stainless	0.5–8 kgf/cm²	80°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Air, water	15A–125A

Steam Traps

Thermodynamic disc, ball float, inverted bucket and by-pass steam traps for drainage of condensate from steam mains, tracers and process equipment.

Key features

Disc traps with hardened stainless disc and seat
Stainless disc traps rated 30 kgf/cm² / 400°C
Ball float traps for heat exchangers and dryers
Inverted bucket traps with reliable air venting
By-pass trap with built-in globe valve

Applications

Steam mains and tracer lines
Heat exchangers and unit heaters
Dryers and process equipment

10A–50A; 0.35–30 kgf/cm²; up to 400°C

9 models

Model	Series	Body material	Pressure	Max. temperature	End connection	Fluid	Sizes
TDC-1S	Disc (thermodynamic)	FCD450	0.35–16.0 kgf/cm²	220°C	JIS B0203 thread	Steam	15A–40A
TDC-1F	Disc (thermodynamic)	FCD450	0.35–16.0 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Steam	15A–50A
TDC-3S	Disc (thermodynamic)	Stainless steel	0.35–30.0 kgf/cm²	400°C	JIS B0203 thread	Steam	10A–25A
TDC-3F	Disc (thermodynamic)	Stainless steel	0.35–30.0 kgf/cm²	400°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Steam	15A–25A
TBP-1S	Disc trap with by-pass	FCD450	0.35–16.0 kgf/cm²	220°C	JIS B0203 thread	Steam	15A–25A
TFT-1S	Ball float	FCD450	0.35–10.0 kgf/cm²	220°C	JIS B0203	Steam	15A–50A
TFT-1F	Ball float	FCD450	0.35–20.0 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Steam	15A–50A
TBK-1S	Inverted bucket	FCD450	0.35–10.0 kgf/cm²	220°C	JIS B0203 thread	Steam	15A–50A
TBK-1F	Inverted bucket	FCD450	0.35–16.0 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Steam	32A–50A

Control and Temperature Regulating Valves

Two-way and three-way control valves with pneumatic diaphragm or electric motor actuators, a three-way rotary valve with positioner, and self-acting temperature regulating valves for steam heating.

Key features

2-way and 3-way globe control valves to 250A
Pneumatic diaphragm or electric motor actuation
3-way rotary valve up to 450A
Self-acting temperature regulators (pilot or direct)
For temperature, pressure, flow and level loops

Applications

Ship and plant cooling and heating systems
Hot water tanks and heat exchangers
Process temperature control

15A–450A; up to 20 kgf/cm²; up to 220°C

Model	Series	Body material	Pressure	Max. temperature	End connection	Fluid	Sizes
2CDC-1F	2-way, pneumatic diaphragm actuator	FCD450 / SC480 / stainless	Up to 20 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water, steam, oil, liquid	15A–250A
2CMC-1F	2-way, electric motor actuator	FCD450 / SC480 / stainless	Up to 20 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water, steam, oil, liquid	15A–250A
3CDC-1F	3-way, pneumatic diaphragm actuator	Carbon steel / stainless	Up to 20 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water, steam, oil, liquid	25A–200A
3CMC-1F	3-way, electric motor actuator	Carbon steel / stainless	Up to 20 kgf/cm²	220°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water, steam, oil, liquid	25A–200A
3RC-1F	3-way rotary, pneumatic cylinder + positioner	FCD450 / SC480	Up to 10 kgf/cm²	100°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Water, oil, liquid	80A–450A
TYR-1F	Temperature regulating, pilot	FCD450 / SC480	Up to 10 kgf/cm²	100°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Steam	15A–100A
YTR-2F	Temperature regulating, direct	FCD450 / SC480 / bronze	Up to 10 kgf/cm²	100°C	JIS B2220 / ANSI B16.5 / DIN 2511 flange	Steam	15A–40A

Strainers, Line Valves, Sight Glasses, Air Vents and Air Traps

Pipeline accessories that complete steam and fluid systems: Y-type strainers, globe and angle valves, sight glasses and sight checks, air vents and compressed-air drain traps.

Key features

Y-strainers in threaded and flanged versions
Globe and angle valves to 16 kgf/cm²
Flapper sight glasses and ball sight checks
Ball float air vents and steam air vents
Air traps up to 30K flanges

Applications

Steam and condensate lines
Compressed air drainage
Water and oil piping

15A–100A; up to 30 kgf/cm²; up to 220°C

13 models

Model	Series	Body material	Pressure	Max. temperature	End connection	Fluid	Sizes
STY-1S	Y-type strainer	Bronze / stainless steel	Up to 20 kgf/cm²	220°C	JIS B0203 thread	Water, steam, oil, liquid	20A–50A
STY-1F	Y-type strainer	FC / FCD450 / BC6 / SC480	Up to 20 kgf/cm²	220°C	JIS B2220 flange	Water, steam, oil, liquid	20A–100A
YGL-1F	Globe valve	FCD450	Up to 16 kgf/cm²	220°C	JIS B2220 flange	Steam, air, liquid, water	15A–50A
YAN-1F	Angle valve	FCD450	Up to 16 kgf/cm²	220°C	JIS 16K FF flange	Steam, air, liquid, water	15A–40A
YSG-1S	Sight glass, flapper	FCD450	Up to 10 kgf/cm²	220°C	JIS B0203 thread	Steam, air, liquid, water	15A–50A
YSG-1F	Sight glass, flapper	FCD450	Up to 10 kgf/cm²	220°C	JIS B2220 flange	Steam, air, liquid, water	15A–100A
YSC-1S	Sight check, ball	Bronze	Up to 10 kgf/cm²	220°C	JIS B0203 thread	Steam, air, liquid, water	15A–25A
YAV-1	Air vent	Brass	Up to 10 kgf/cm²	80°C	JIS B0203 thread	Water	15A–20A
YAV-1F	Air vent, angle ball float	FCD450	Up to 16 kgf/cm²	220°C	JIS B2220 flange	Water, oil	15A–25A
YSV-1S	Steam air vent	Brass	Up to 30 kgf/cm²	220°C	JIS B0203 thread	Steam system air	15A
TAT-1S	Air trap, ball float	FCD450	Up to 10 kgf/cm²	100°C	JIS B0203 thread	Compressed air	15A–25A
TAT-1F	Air trap, ball float	FCD450	Up to 10 kgf/cm²	100°C	JIS B2220 flange	Compressed air	15A–25A
TAT-3F	Air trap, ball float	SC480	Up to 30 kgf/cm²	100°C	JIS B2220 30K flange	Compressed air	15A–25A

Safety Valves for Semiconductor Gas Lines

Clean safety valves for nitrogen lines in semiconductor equipment, in straight and angle body forms with PTFE lining or electropolished stainless finish.

Key features

PTFE lining or electropolished (EP) finish
Angle type uses bellows seal
SCS13 / SCS14 stainless bodies
JIS 10K RF flange ends

Applications

Semiconductor equipment N2 lines
Clean gas systems

20A–50A; 0.5–8.0 kgf/cm²; 50°C; N2

Model	Series	Body material	Pressure	Max. temperature	End connection	Fluid	Sizes
SFS-2	Straight, PTFE-lined / electropolished	SCS13	0.5–8.0 kgf/cm²	50°C	JIS 10K RF × JIS 10K RF	N2	20A×20A–50A×50A
SFA-1	Angle, bellows, PTFE-lined / electropolished	SCS14	0.5–8.0 kgf/cm²	50°C	JIS 10K RF × JIS 10K RF	N2	20A×20A–50A×50A

Company facts

Country: South Korea
Founded: 2000
Business registration: Not provided

Product lines

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YOOYOUN Co., Ltd.

About

Products

Safety Relief Valves and Vacuum Breakers

Key features

Applications

Pressure Reducing and Regulating Valves

Key features

Applications

Steam Traps

Key features

Applications

Control and Temperature Regulating Valves

Key features

Applications

Strainers, Line Valves, Sight Glasses, Air Vents and Air Traps

Key features

Applications

Safety Valves for Semiconductor Gas Lines

Key features

Applications

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