DHcontrols

A GLOBAL INDUSTRY LEADER AND
DRIVING INNOVATION FOR THE FUTURE

SCR & EGR & GAS CONTROL SYSTEM

Specialized Valve Soluition

Thank you for your interest in
DH Controls

Dear Visitors,

I extend a warm welcome to DH Controls a leading provider of equipment for ships, marine engines, and onshore plants. We have established strategic alliances with the world's best cooperative companies, making us a trusted and reliable partner for our customers.

At DH Controls, we prioritize technology and quality competitiveness to ensure customer satisfaction. We are committed to sustainable development, making bold investments and best efforts to reduce our carbon footprint. We believe in actively responding to the eco-friendly energy fields to overcome climate change and achieve carbon neutrality.

Our goal is to become the world's best company by diversifying our business with state-of-the-art technology and the best quality. With our focus on innovation and excellence, we are confident that we can deliver the best possible solutions to meet the needs of our customers.

Thank you for visiting DH Controls. We look forward to working with you to achieve mutual success.

Best regards,

History

2009 ~ 2016
2017 ~ 2021
2022 ~ 2025

2016

Acquired Inno-Biz Certification
Established a Partnership with HHI-Engine & Machinery
Headquarters Expansion and Relocation to Changwon City

2015

Established a Partnership with Major Shipbuilders Including SHI, STX Shipbuilding, and HJSC
Honored with the Trade Promotion Commendation
(Ministry of Trade, Industry and Energy)

2014

Established a Partnership with Major Shipbuilders Such as HMD, DSME, DH Shipbuilding, and Daesun Shipbuilding

2013

Established R&D Center
Honored with the Gyeongnam SME Award

2012

Certified as a Venture Enterprise
Designated as a Promising SME in Export

2011

The World First Development of Screw Down Valve & Hydraulic Actuator

2009

Incorporated in Busan Metropolitan City, Korea

2021

Honored with the Digital Innovation Grand Prize
(Ministry of Science and ICT and The Hankook Ilbo)
Honored with the Commendation for Contributions to the Promotion of the Materials, Components,
and Equipment Industry (Ministry of Trade, Industry and Energy)
Designated as the National Top 1,000 Innovative Companies
(Ministry of Trade, Industry and Energy)
Designated as a Busan Regional Star Company (Busan Metropolitan City)
Designated as a Promising SME (BNK Bank)
Established a Partnership with HSD Engine and Supplied a Valve System for the EGR System

2020

Acquired K-Star Enterprise Certification (KTL)
Certified for MAN Diesel & Turbo Tier III Valve (Group 1~4)

2019

Established a Partnership with HPS and Supplied a Damper System for Scrubber

2018

Acquired the First Certification of Approval (MAN Energy Solutions)

2017

Development of Valve System for SCR & EGR
Initiation for SCR-LP Supply to Hyundai Heavy Industries
Honored with the Commendation for Industry Innovation Movement
(National Commission for Corporate Partnership)

2025

Designated as a Busan Leading Company (Busan Metropolitan City)
Designated as a Reliable Marine Equipment Manufacturer & Supplier (KOMEA)
Designated as an Excellent Quality Cooperation Partner (HHI)
Designated as a Participant Company in the Jump Up Program (Ministry of SMEs and Startups, KOSMES)
Expanded with the Second Factory

2024

Established a Partnership with Hitachi Zosen Marine Engine (Japan) and Supplied Valves for SCR HP
Established a Partnership with YCMP, SCE, Hengli and HHM (China) to Supply Valves for SCR HP/EGR
Designated as an IP Star Company (Korea Invention Promotion Association)
Designated as a Regional Specialization Regend 50+ (Busan Metropolitan City)
Designated as a Global Small Giants 1000+ (Ministry of SMEs)
Honored for Contributions to Public Technology Commercialization (Ministry of Science and ICT)

2023

Established a R&D Partnership (SK E&S)
Initiation of Development for SCR for Simultaneous Reduction of NOx and N2O in Ammonia Ships
Acquired the First Supplier Approval (WinGD)
Designated as an Excellent ESG Company (KCCP)
Designated as a Clean Energy Tech-Innovation Company (Busan Metropolitan City)
Honored for Contributions to Technology Innovation (Innobiz Association)

2022

Introduction of ESG Management Practices
Designated as a K-Pre-Unicorn Candidate Company (KOSME)
Formalized a Strategic Business Partnership with the Busan Hydrogen Alliance

Domestic

Busan

Ulsan

Changwon

Geoje

Yeongwol

Incheon

Taean

Busan

Ulsan

Changwon

Geoje

Yeongwol

Incheon, Taean

Overseas

Germany
Denmark

Swiss

India

China

Taiwan

Japan

Germany Denmark

Swiss

India

China

Taiwan

Japan

Award / Certificate

Award /

No	Award Title
01	Hyundai Integrated Quality
02	Award
03	Award
04	Digital Innovation Awards 2022
05	Digital Innovation Awards 2023
06	Award
07	Award
08	Award
09	Award
10	Award

Certificate /

No	Certificate Title	Certificate No.	-	-
01	Quality Mnangement System Certificate	ISO 9001:2015	-	-
02	Enviromental Management System Certificate	ISO 14001:2015	-	-
03	Occupational Health And Safety Management System Certificate	ISO 45001:2018	-	-
04	Certificate of Excellent ESG	2023-68	-	-
05	Global Powerhouse 1,000+ Company Designation Certificate	2024-349	-	-
06	Confirmation of selection of participating companies for the regional specialization project Legend 50+	-	-	-
07	Leading Company Certificate	-	-	-
08	Clean Energy Technology Innovation Company Certification Plaque	602-81-48740	-	-
09	Certificate of Beliabilitp	KQ-2025-01	-	-
10	-	-	-	-
11	WinGD Supplier Approval iCER Valve		Butterfly Valve for iCER
12	WinGD Supplier Approval Exhaust Control Valve for iSC		EFCV for iSCR
13	MAN-ES Certificate of Approval Tier Ⅲ Standard Valve group 1,2,3	2700-2022-742.1	RBV, RTV, RSV, TCV, CBV, EGB	MAN-ES
14	MAN-ES Provisional Certificate of Approval Tier Ⅲ Standard Valve group 1, 2, 3	2700-2022-622.2	RBV, RTV, RSV, TCV, CBV, EGB	DH
15	MAN-ES Certificate of Approval Tier Ⅲ Acid Resistant Valve group 1, 2, 3, 4	2700-2022-741.2	BTV, BBV, SOV	MAN-ES
16	MAN-ES Provisional Certificate of Approval Tier Ⅲ Acid Resistant Valve group 1, 2, 3	2700-2022-857.0	CCV	MAN-ES
17	MAN-ES Provisional Certificate of Approval Tier Ⅲ Acid Resistant Valve group 1, 2, 3, 4	2700-2022-623.2	BTV, CCV, BBV, SOV	DH
18	MAN-ES Provisional Certificated of Approval Tier Ⅲ Valve group 2, 3	1019.1	CCV	DH
19	MAN-ES Provisional Certificate of Approval Tier Ⅲ Acid Resistant Valve Group 1, 2	2700-2022-855.2	ERG Throttle Valve	MAN-ES
20	MAN-ES Provisional Certificate of Approval Tier Ⅲ Standard Valve group 1, 2	2700-2022-854.2	Eco Cylinder Bypass Valve	MAN-ES

Class Approval & Patent

Class Approval List
Domestic Patent List
Overseas Patent List

Class Approval List

No	Class Approval Title	Certificate No.	Class
01	SCR HP		BV
02	SCR HP		CCS
03	SCR HP		LR
04	2-way Control Valve	17-BK1666114-PDA	ABS
05	Butterfly Valve	18-BK1813813-PDA	ABS
06	Cryogenic Valve	21-BK2125762-PDA	ABS
07	2-way Control Valve	BTS / ENG / M220971	LR
08	By-pass Valve	CWN32775-VV001	KR

Domestic Patent List

No	Patent Title	Patent Number
01	Apparatus and Method for Founding a Remote Controlle	10-1296836
02	Valve in the Depth of Water	10-1308553
03	Apparatus for Remotely Detecting Position using Oil Hydraulic Motor	10-1371344
04	Apparatus for Remotely Detecting Position of Multirotation Actuator	10-1383068
05	3 Way Control Valve	10-1444193
06	Butterfly valve	10-1444195
07	Ballast Tank Watering Valve Indicator for Ship	10-1512299
08	Apparatus for Detecting Position of Underwater Valve	10-1657942
09	Hydraulic Actuator for Quarter-turn Valve	10-1657945
10	System for Adjusting Viscosity of Fuel	10-1658218
11	Manual Hydraulic Remote Control Apparatus for Multi Valve Operation	10-1707174
12	Safety Valve for Shipping Engine	10-1847052
13	Air Pressure Valve for Diesel Engine	10-1944054
14	Vapor Ejector for the Heat Recovery Steam Generator of a Thermoelectric Power Plant	10-1981889 15
15	LNG Bunkering Monitoring System with Cryogenic Valve Operated by Hydraulic Actuator	10-1981064
16	Flushing Water Supply System for Cleaning Storage Tank	10-1984529
17	3-Way Valve with Non-linear Flow Characteristic	10-1999440
18	Cryogenic Valve System	10-2041458
19	3-Way Electronic Valve with the Function of the High Performance of Flow Rate	10-2044025
20	System for Adjusting Viscosity of Fuel having Viscosity Sensor using Photoacoustic Effect	10-2153389
21	Sensing and Measurement Assembly for Viscosity Control System of Fuel Oil using at Vesse	10-2178584
22	High Temperature Air Sealing Butterfly Valve	10-2188910
23	Air Sealing Control Valve with Improved Emission Reduction of Exhaust Gas	10-2295552
24	Exhaust Gas Control Valve for Diverter Type Scrubber	10-2329529
25	System For Real-Time Collecting Temperature and Predicting Failure of selective catalytic Reduction Valve	10-2523774

Overseas Patent List

No	Patent Title	Country	Patent Number
01	Apparatus for remotely detecting position using oil hydraulic motor	JAPAN	5872630
02	Apparatus for remotely detecting position of multirotation actuato	JAPAN	5731619
03	Hydraulic actuator for quarter-turn valve	JAPAN	6087992
04	Apparatus for detecting position of underwater valve	JAPAN	6203902
05	High temperature air sealing butterfly valve	JAPAN	6853336
06	Hydraulic actuator for quarter-turn valve	CHINA	ZL201610388163.0
07	LNG Bunkering Monitoring System with Cryogenic Valve Operated by Hydraulic Actuator	CHINA	ZL201911101002.9

Valves for Exhaust Gas Flow Control

SCR LP [Low Pressure] Damper

FEATURES

This valve is designed for pollution environment of IMO rule.
On-off type, proportion control type(Depending on the system)
Criterion of valves work scope for LP(Low Pressure SCR System)
- RBV (Reactor By-pass Valve), RSV (Reactor Sealing Valve), RTV (Reactor Throttle Valve), ASV (Ari Sealing Valve)
- BSV (Blower Sealing Valve), EGB-BV (EGB-By-pass Valve), BTV (Blower Throttle Valve), EGB-SV (EGB-Supply Valve)
This valve is mainly used for 2SK and 4SK.

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)
Material	Trim	Stainless Steel
Accessories(option)		Smart Positioner, Air filter regulator, Solenoid valve, Limit Switch, Junction Box, Air Tank, PDT

Valves for Exhaust Gas Flow Control

SCR HP [High Pressure] Valve

FEATURES

This valve is designed for pollution environment of IMO rule.
On-off type, proportion control type(Depending on the system)
Criterion of valves work scope for HP(High Pressure)SCR System
- RBV (Reactor By-pass Valve), RSV (Reactor Sealing Valve), RTV (Reactor Throttle Valve),
- CBV (Cylinder By-pass Valve), EGB (Exhaust Gas By-pass Valve)
Standard TIER III valve.

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
Material	Trim	Stainless Steel
Accessories (option)		Smart Positioner, Air filter regulator, Solenoid valve, Limit Switch

Valves for Exhaust Gas Flow Control

EGR Valve

FEATURES

It ensure proper operation of engine and EGR system (Gas-liquid fluid composition) by using 4-7 difference butterfly valves.
Various type according to application position.
There are Standard type and Acid resistant type.

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
Material	Trim	Stainless Steel		Stainless Steel
Accessories(option)		Smart Positioner, Air regulator, Solenoid valve, Limit Switch		Smart Positioner, Air regulator, Solenoid valve, Limit Switch

Valves for Exhaust Gas Flow Control

iSCR Valve

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

Valves for Exhaust Gas Flow Control

iCER Valve

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
Material	Trim	Stainless steel
Accessories (option)		Positioner, Air fiter regulator, Air tank, NCS Sensor, Solenoid valve

Valves for Exhaust Gas Flow Control

Compressor Air Bleed Valve

SPECIFICATIONS

MODEL		COMPRESSOR AIR BLEED VALVE
Working Fluid		Air
Working Pressure		4 ~ 12.5 bar
Workging 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
Material	Trim	Solid Seat / Laminate Seat
Accessories (option)		Positioner, Air fiter regulator, Solenoid valve

Valves for Exhaust Gas Flow Control

Air Sealing Damper

FEATURES

Insulation function to block gas flow in duct.
Damper is configured to perform operations in remote or manual mode.
High airtightness can be maintained by using special seal strip and seal air fan to prevent gas from entering into closed damper.

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
Meterial	Body	Cabon Steel (~400°C) / Stainless Steel (~500°C)
Meterial	Trim	Stainless Steel
Test Procedure		Seal air pressure : Over 500mmWC
Accessories(option)		Air filter regulator, Solenoid valve, Limit Switch, Speed controller

MODEL	SEAL AIR FAN
Type	STF-4HB-IM
Air Volume	16~150 m³/min
Static pressure	752mmAq
Revolution	20℃
Gas composition	Air -18~45℃ R.H.80%
Material	Carbon Steel
Installation	IN DOOR

Valves for Alternative Fuel Supply

Safety Valve Unit

SPECIFICATIONS

MODEL		DSVU-MM	DSVU-AMM
Working Fluid		Methanol	Ammonia
Working Pressure		300 ~ 600 bar	700 bar
Workging Temperature		-20℃ ~ 60℃
Size (Inlet x Oulet)		25A x 50A
Material	Body	Carbon steel
Material	Trim	Stainless steel

Valves for Alternative Fuel Supply

Hydrogen Valve

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

Valves for Cryogenic Fuel

Cryogenic Control Valve

FEATURES

The cryogenic valves are available up to Large valve sizes
High reliability in low temperature.
The emergency handle can be attached.
The operation is possible with a relatively small force.
Various types of actuators are supplied according to installation conditions.

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
Material	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

Valves for Cryogenic Fuel

Cryogenic Safety Valve

SPECIFICATIONS

MODEL		DHGT-MR
Operating Fluid		Liquedfied Gas / LNG / LPG / LEG / LN² / LO² / LAr
Workging 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
Material	Trim	Stainless steel
Design Codee		ASME / API