Headquarters & First Factory
74, Mieumgukje 4-ro, Gangseo-gu, Busan, Korea
- Site area
- 6,858 m²
- Gross floor area
- 6,484 m²
- Completed
- 2020.04
DH CONTROLS / PRODUCT CATALOG
Valves and units for
cleaner marine power
HIGH-TEMPERATURE VALVES
FUEL COMPONENTS · DOSING & PUMP UNITS
2026.10COMPANY
Company
DH CONTROLS develops and supplies high-temperature butterfly valves, exhaust gas flow control valves, alternative-fuel valves, and dosing and pump units for marine engines.Product development and production are based at its headquarters, first factory, and R&D center with a second factory in Busan, Korea.
BUSAN / KOREA
Production & research
R&D Center & Second Factory
69, Mieumgukje 4-ro, Gangseo-gu, Busan, Korea
- Site area
- 4,558 m²
- Gross floor area
- 3,181 m²
- Completed
- 2026.08
No matching products
01
Exhaust Gas Flow Control Valves
Low-pressure SCR Valve
Pneumatic damper for low-pressure SCR exhaust-gas routing, sealing and throttling positions
- Temperature
- 20–420°C / 20–500°C
- Size
- 200A–3200A
- Actuation
- Pneumatic
Specifications
| MODEL | SCR-LP | ||||||
|---|---|---|---|---|---|---|---|
| Type | Controllable | On / Off | Controllable | On / Off | Controllable | On / Off | |
| Application Position | RTV | RBV / RSV | RBV / RSV | ASV | EGB-BV | BTV / EGB-SV | |
| Working Fluids | Warm exhaust gas | ||||||
| Temperature Range | 20°C ~ 420°C / 20°C ~ 500°C | ||||||
| Valve Type | Flange / Damper | ||||||
| Actuator Type | Pneumatic | ||||||
| Action | Double / single acting | ||||||
| Valve Size | 200A ~ 3200A | ||||||
| End Connection | JIS / DIN / ISO / ANSI Standard | ||||||
| Material | Body | Carbon Steel (~420°C) / Carbon-silicon, killed Steel (~500°C) | |||||
| Trim | Stainless Steel | ||||||
| Accessories(option) | Smart Positioner, Air filter regulator, Solenoid valve, Limit Switch, Junction Box, Air Tank, PDT | ||||||
02
Exhaust Gas Flow Control Valves
Air Sealing Damper
Air-sealing damper for exhaust-gas flow control on four-stroke generator enginesSeal air provides isolation in the exhaust duct.
- Temperature
- 20–500°C
- Size
- 200A–3200A
- Actuation
- Pneumatic
Specifications
| MODEL | DAMPER | ||||
|---|---|---|---|---|---|
| Type | Air seal damper | ||||
| Application Position | Main Engine | Generator Engine | Aux. Boiler | Comp. Boiler | |
| Working Fluids | Warm exhaust gas | ||||
| Temperature Range | 20°C ~ 500°C | ||||
| Valve Type | Flange / Damper | ||||
| Actuator Type | Pneumatic | ||||
| Action | Single acting | ||||
| Valve Size | 200A ~ 3200A | ||||
| End Connection | JIS / DIN / ISO / ANSI Standard | ||||
| Material | Body | Cabon Steel (~400°C) / Stainless Steel (~500°C) | |||
| Trim | Stainless Steel | ||||
| Test Procedure | Seal air pressure : Over 500mmWC | ||||
| Accessories(option) | Air filter regulator, Solenoid valve, Limit Switch, Speed controller | ||||
03
Exhaust Gas Flow Control Valves
HP SCR Valve
Pneumatic butterfly valve for high-pressure SCR exhaust-gas control positions
- Temperature
- 200–500°C; max. 550°C
- Size
- Ø50–DN1600
- Actuation
- Pneumatic
Specifications
| MODEL | SCR-HP | ||
|---|---|---|---|
| Type | Controllable | On / Off | |
| Application Position | RTV, RBV, EGB, CBV, IRBV | RSV | |
| Working Fluids | Warm exhaust gas or Air | ||
| Temperature Range | 200~500°C (Max. 550°C) | ||
| Valve Type | Wafer | ||
| Actuator Type | Pneumatic | ||
| Action | Double / Single acting | ||
| Valve Size | Φ50 ~ DN1600 | ||
| End Connection | JIS / DIN / ISO / ANSI Standard | ||
| Material | Body | Carbon moly alloy steel | |
| Trim | Stainless Steel | ||
| Accessories (option) | Smart Positioner, Air filter regulator, Solenoid valve, Limit Switch | ||
| Engine builder | Engine type |
|---|---|
| Everllence | 6S40ME-C9.5 |
| DKD (China) | 6S40ME-C9.5 |
| DKD (China) | 6S35ME-C9.7 |
| HENGLI | 6S40ME-C9.5 |
| YMD | 6S35ME-B9.5 |
04
Exhaust Gas Flow Control Valves
EGR Valve
Standard and acid-resistant butterfly valve options for exhaust-gas recirculation arrangements
- Variants
- Standard / acid-resistant
- Size
- Ø50–DN1600
- Actuation
- Pneumatic
Specifications
| MODEL | EGR-STANDARD | EGR-ACID RESISTANT | |||
|---|---|---|---|---|---|
| Type | Controllable | On / Off | Controllable | On / Off | |
| Application Position | EGB, CBV | TCV | BTV | CCV, BBV, SOV | |
| Working Fluids | Warm exhaust gas or air | Wet and / or cold exhaust gas | |||
| Temperature Range | 20°C ~ 420°C / 20°C ~ 500°C | 25 ~ 75℃ (Max. 200℃) | 25 ~ 75℃ (Max. 200℃) or 25 ~ 500℃ (Max. 550℃) | ||
| Valve Type | Wafer | Wafer | |||
| Actuator Type | Pneumatic | Pneumatic | |||
| Valve Size | Φ50 ~ DN1600 | Φ50 ~ DN1600 | |||
| End Connection | JIS / DIN / ISO / ANSI Standard | JIS / DIN / ISO / ANSI Standard | |||
| Material | Body | Carbon moly alloy steel | Casted Stainless Steel | ||
| Trim | Stainless Steel | Stainless Steel | |||
| Accessories(option) | Smart Positioner, Air regulator, Solenoid valve, Limit Switch | Smart Positioner, Air regulator, Solenoid valve, Limit Switch | |||
05
Exhaust Gas Flow Control Valves
iCER Valve
Butterfly valves for iCER exhaust-gas circuits, with single- and double-disc configurations.
- Temperature
- Up to 380°C
- Size
- DN400–DN2700
- Connection
- DIN
Specifications
| MODEL | ICER VALVE | ||
|---|---|---|---|
| Type | Controllable | On / Off (Shut-off) | |
| Application Position | BPV, FRV | SOV, FRV | |
| Working Fluids | Exhaust gas | ||
| Temperature Range | ~ 380℃ | ||
| Valve Type | Butterfly valve, single or double disc | ||
| Actuator Type | Double acting (alternatively, Single acting) | ||
| Valve Size | DN400 ~ DN2700 | ||
| End Connection | DIN | ||
| Material | Body | Stainless steel | |
| Trim | Stainless steel | ||
| Accessories (option) | Positioner, Air filter regulator, Air tank, NCS Sensor, Solenoid valve | ||
06
Exhaust Gas Flow Control Valves
iSCR Valve
The EFCV valve is designed for the exhaust lines of ammonia-fueled engines, with a working pressure of 6 bar and a working temperature of 380°C.
- Model
- EFCV
- Working pressure
- 6 bar
- Working temperature
- 380°C
Specifications
| MODEL | EFCV | |
|---|---|---|
| Working Fluid | (Ammonia Fuel) Exhaust Gas | |
| Working Pressure | 6 bar | |
| Working Temperature | 380℃ | |
| Material | Body | SB450M |
| Flap | ||
| Spindle | ||
| Accessories (option) | Inductive sensor, Positioner | |
07
Alternative Fuel
Methanol Fuel Components
DSVU-MM Safety Valve Unit for methanol fuel service.
- Model
- DSVU-MM
- Fluid
- Methanol
- Pressure
- 300 ~ 600 bar
- Temperature
- -20℃ ~ 60℃
Specifications
| MODEL | DSVU-MM | |
|---|---|---|
| Working Fluid | Methanol | |
| Working Pressure | 300 ~ 600 bar | |
| Working Temperature | -20℃ ~ 60℃ | |
| Size (Inlet x Outlet) | 25A x 50A | |
| Material | Body | Carbon steel |
| Trim | Stainless steel | |
08
Alternative Fuel
Ammonia Fuel Components
DSVU-AMM Safety Valve Unit for ammonia fuel service.
- Model
- DSVU-AMM
- Fluid
- Ammonia
- Pressure
- 700 bar
- Temperature
- -20℃ ~ 60℃
Specifications
| MODEL | DSVU-AMM | |
|---|---|---|
| Working Fluid | Ammonia | |
| Working Pressure | 700 bar | |
| Working Temperature | -20℃ ~ 60℃ | |
| Size (Inlet x Outlet) | 25A x 50A | |
| Material | Body | Carbon steel |
| Trim | Stainless steel | |
09
Alternative Fuel
Safety Valve Unit
DSVU-MM for methanol and DSVU-AMM for ammonia: safety valve units configured for each fuel
- Models
- DSVU-MM / DSVU-AMM
- Fluid
- Methanol / ammonia
- Temperature
- −20 to 60°C
Specifications
| MODEL | DSVU-MM | DSVU-AMM | |
|---|---|---|---|
| Working Fluid | Methanol | Ammonia | |
| Working Pressure | 300 ~ 600 bar | 700 bar | |
| Working Temperature | -20℃ ~ 60℃ | ||
| Size (Inlet x Outlet) | 25A x 50A | ||
| Material | Body | Carbon steel | |
| Trim | Stainless steel | ||
10
Alternative Fuel
Hydrogen Valve
Control, shutoff and check valves for hydrogen lines
- Grade
- H70
- Temperature
- −40 to 85°C
- Material
- SUS316L
Specifications
| MODEL | FLOW CONTROL VALVE | STOP VALVE | CHECK VALVE |
|---|---|---|---|
| Working Fluid | Hydrogen | ||
| Grade | H70 | ||
| Working Temperature | -40 ~ 85℃ | ||
| Size | 3/8", 9/16", 3/4" | 3/8", 9/16" | 3/8", 9/16", 3/4" |
| End Connection | 3/8"(LF6), 9/16"(LF9), 3/4"(LF12) | ||
| Material | SUS316L | ||
11
Dosing & Pump Units
iSCR Dosing / Pump Unit
Service tank↓Pump unit↓Dosing unit
In iSCR installations, the pump unit supplies and circulates urea solution, while the dosing unit controls injection.
12
Marine & Industrial Valves
Hydraulic Actuator
A multi-turn hydraulic actuator for screw-down valve control
- Type
- Multi-turn hydraulic
- Operating fluid
- Mineral oil (ISO VG15–32)
- Maximum operating pressure
- 135 bar
Specifications
| MODEL | DHGT-MR | DHGL-MR | DHAG-MR | |
|---|---|---|---|---|
| Operating Fluid | Mineral Oil (ISO VG15~32) | |||
| Temperature Range | -20℃ ~ 80℃ | |||
| Actuator Type | Multi Turn Hydraulic | |||
| Operating Pressure (max.) | 135 bar | |||
| Working Pressure | Open | 110 bar | ||
| Close | 100 bar | |||
| Applicable Valve Type | Gate | Globe | Angle | |
| Valve Size | 50A~750A | 50A~600A | ||
| Accessory (option) | Local Position Indicator | |||
13
Marine & Industrial Valves
Pressure Regulating Valve
A self-acting valve for downstream pressure control, with DRG-CY, DRG-DP and DRG-PL models
- Models
- DRG-CY / DRG-DP / DRG-PL
- Working fluids
- Air / water / liquid / oil
- Size
- 15A–200A, depending on model
Specifications
| MODEL | DRG-CY | DRG-DP | DRG-PL | |
|---|---|---|---|---|
| Working Fluids | Air, Water, Liquid, Oil | |||
| Temperature Range/Press | 150℃ / 20K | |||
| Valve Type | Cylinder | Diaphragm | Pilot | |
| Valve Size | 15A ~ 150A | 15A ~ 150A | 32A~200A | |
| End Connection | JIS / DIN / ISO / ANSI Standard | Material | Body | Cast Steel, Ductile Cast Iron, Cast Bronze |
| Trim | Stainless Steel | |||
| Accessory | Glycerin Port, Y-Strainer, Press. Gauge | |||
14
Marine & Industrial Valves
Safety Relief Valve
A Safety Relief Valve range for steam, air, water and liquid service
- Models
- DSV-OL / DSL-OL / DSH-OL
- Working fluids
- Steam / air / water / liquid
- Size
- 15A–200A, depending on model
Specifications
| MODEL | DSV-OL, CC, CL | DSL-OL,CC | DSH-OL, CC |
|---|---|---|---|
| Working Fluids | Steam, Air, Water, Liquid | ||
| Temperature Range / Press | 0℃ ~200℃/30K | ||
| Valve Type | Full Bore | Low Lift | High Lift |
| Cap / Lever type | Close Cap, Close Lever, Open Lever | ||
| Valve Size | 15A ~ 200A | 15A ~ 50A | 15A ~ 50A |
15
Marine & Industrial Valves
Cryogenic Control Valve
Control valves for liquefied-gas and cryogenic service.
- Temperature
- −196 to 80°C
- Size
- DN15–DN300
- Body
- ASTM A351 stainless castings
Specifications
| MODEL | DCGT-MR | |||
|---|---|---|---|---|
| Operating Fluid | Liquefied GaAS / LNG / LPG / LN² | |||
| Temperature Range | -196℃ ~ 80℃ | |||
| Rating | ANSI 150LBS ~ 300LBS / JIS 10K ~ 20K | |||
| Valve Size | 1/2" ~ 12" (DN15 ~ DN300) | |||
| Material | Body | ASTM A351 - CF8, CF8M, CF3M | ||
| Trim | Stainless steel | |||
| Applicable Valve Type | Globe, Angle, Ball, Butterfly | |||
| Actuator Type | Multi Turn Hydraulic | Pneumatic | Motor | |
| Operating Source | 80 bar ~ 90 bar | 0.2~1.0bar / 0.4~2.0bar | 4~20mA | |
| Accessory(option) | Limit Switch, Manual Handle | |||
16
Marine & Industrial Valves
Cryogenic Safety Valve
DHGT-MR safety valve for liquefied-gas service.
- Model
- DHGT-MR
- Temperature
- −196 to 125°C
- Standards
- ANSI / JIS connections
Specifications
| MODEL | DHGT-MR | |
|---|---|---|
| Operating Fluid | Liquedfied Gas / LNG / LPG / LEG / LN² / LO² / LAr | |
| Working Pressure | 0.15 ~ 7 PSI / 0.01 ~ 0.5 kgf/cm² / 0.001 ~ 0.05 Mpa | |
| Working Temperature | - 196℃ ~ 125℃ | |
| Size (Inlet x Outlet) inch | 2x3, 3x4, 4x6, 6x6, 8x10, 10x12 | |
| End Connection | ANSI / JIS Standard | |
| Material | Body | A351 CF8M, B26 356-T6 |
| Trim | Stainless steel | |
| Design Codee | ASME / API | |
17
Marine & Industrial Valves
Air Bleed Valve
Triple-offset butterfly valve for compressor air-bleed service in power plants
Power plants / Compressor air bleed service
- Pressure
- 4–12.5 bar
- Temperature
- Up to 425°C
- Size
- 150A–450A
Specifications
| MODEL | COMPRESSOR AIR BLEED VALVE | |
|---|---|---|
| Working Fluid | Air | |
| Working Pressure | 4 ~ 12.5 bar | |
| Working Temperature | ~ 425℃ | |
| Valve Type | Triple Offset Butterfly valve | |
| Actuator type | Pneumatic (Double, Single acting) | |
| Valve Size | 150A ~ 450A | |
| End Connection | ASME / DIN / ISO / JIS Standard | |
| Material | Body | Cast steel / Stainless steel |
| Trim | Solid Seat / Laminate Seat | |
| Accessories (option) | Positioner, Air filter regulator, Solenoid valve | |
QUALITY
Certifications & approvals
DH CONTROLS
Contact
dh@dohn.kr+82 51-831-265474, Mieumgukje 4-ro, Gangseo-gu,
Busan, Republic of Korea