Rectangular Damper Butterfly Valve

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Rectangular Damper Butterfly Valve

Carbon Steel (WCB, WCC for strength), Stainless Steel (SS304, SS316 for corrosion resistance)

Size Range:2″ to 48″ (DN50-DN1200)

Working Pressure:Up to 300 psi (20.7 bar)

Working Temperature:-30°C to 350°C

Sealing Options:EPDM, PTFE, Metal-to-Metal, NBR, FKM

Manufacturing Method:Cast, Forged, Machined

Applicable Medium:Water, Oil, Gas, Air, Chemical Fluids

Manufacturing Standard:API 609, ASME B16.47, MSS-SP-67, BS EN 593, ISO 5752

Product Overview

The Rectangular Damper Butterfly Valve is designed for precise flow control in HVAC, industrial ventilation, and exhaust systems. Featuring a rectangular or square design to fit duct shapes, it enables effective modulation of air or gas flow. Equipped with a rotating disc that regulates the passage of media, this valve offers smooth operation, low torque, and excellent sealing capabilities. Constructed from durable materials such as stainless steel or carbon steel, it is suitable for high-temperature and corrosive environments. Ideal for applications requiring reliable, adjustable air flow control in ductwork or large-scale ventilation systems.

Product Features

Quick Operation: Butterfly valves can be opened or closed quickly, often using a lever or actuator, allowing efficient flow control. This is particularly beneficial in industries like HVAC systems, fire protection systems, and chemical processing, where rapid flow adjustments are essential.

Low-Pressure Drop: The streamlined disc design ensures minimal resistance to flow, reducing pressure drop across the valve.

Compact and Lightweight: Butterfly valves are smaller and lighter compared to other types of valves, making them easy to install and maintain.

Versatile Connection Options: Available in wafer, lug, flanged, double flanged, and grooved connections to accommodate a wide range of piping configurations.

Resilient or Metal Seat Options: Offers both soft seats (e.g., EPDM, PTFE) for low-pressure applications and metal seats for higher temperatures and pressures.

Manual or Actuated Operation: Can be operated manually using a lever or automated with electric, pneumatic, or hydraulic actuators.

Specification Parameters

Structural Length Standard:
According to API 609, ASME B16.47, ISO 5752, BS EN 558

Connection Forms Standards:
Wafer and lug types per ASME B16.5, flanged per ANSI/ASME B16.42, double flanged, and grooved

Available Sizes (Caliber):
2″, 3″, 4″, 6″, 8″, 10″, 12″, 14″, 16″, 18″, 20″, 24″, 30″, 36″, 42″, 48″

Pressure-Temperature Rating:
Class 150, 300 as per API 609 and ASME B16.47

Pressure Range:
Up to 300 psi depending on size and material

Temperature Range:
-30°C to 350°C depending on material and sealing options

Nominal pressurePN	0.005MPa	Leak rate	≤3
Proper temperature	-30～350℃	Medium flow rate	≤25m/s
Suitable media	Dust, dusty gas

The main shape and connection size

A×B	A1×B1	A2×B2	L	L1	H1	H	b	Z-Фd	X	Y
320×180	375×105	400×240	180	245	580	735	8	16-14	5	3
320×250	375×295	400×330	180	245	625	825	8	16-14	5	3
400×200	455×255	500×330	200	245	610	805	8	16-18	5	3
400×320	455×375	500×420	200	245	870	915	8	16-18	5	3
500×200	555×255	600×300	220	245	610	805	8	16-18	5	3
500×400	555×455	600×500	220	245	670	915	8	20-18	5	5
630×320	685×375	730×420	220	245	610	805	10	20-18	7	3
630×400	685×455	730×500	220	245	710	995	10	24-18	7	5
800×400	855×455	900×500	240	300	610	945	10	24-18	7	5
800×630	855×685	900×730	240	300	710	995	10	28-18	7	7
1000×500	1070×570	1130×830	260	300	790	1075	10	24-23	7	5
1000×800	1070×870	1130×930	260	300	905	1270	10	28-23	7	7
1250×630	1320×700	1380×760	280	300	1005	1505	10	32-23	9	7
1250×1000	1320×1070	1380×1130	280	300	1105	1705	10	32-23	9	7
1400×800	1470×870	1530×930	300	385	1075	1575	10	36-23	11	7
1400×1250	1470×1320	1530×1380	300	385	1300	2025	10	40-23	11	9
1600×1000	1670×1070	1730×1130	320	385	1175	1775	10	36-23	11	7
1600×1250	1670×1320	1730×1380	320	385	1300	2025	10	40-23	11	9
1800×1250	1870×1320	1930×1380	340	420	1450	2175	10	44-23	13	9
1800×1400	1870×1470	1930×1530	340	420	1525	2325	10	48-23	13	11
2000×1250	2070×1320	2130×1380	360	420	1450	2175	10	48-23	15	9
2000×1800	2070×1670	2130×1730	360	420	1620	2520	12	52-23	15	11
2500×1800	2570×1870	2630×1730	420	450	1695	2595	12	56-23	17	11
2500×2000	2570×2070	2630×2130	420	450	1895	2995	12	64-23	17	15
2800×2500	2870×2570	2930×2630	440	450	2145	3195	12	72-23	19	17
3200×2800	3270×2870	3330×2930	480	480	2325	3825	12	80-23	21	19
3600×3200	3670×3270	3730×3330	520	480	2525	4225	12	88-23	23	21
4000×3600	4070×4670	4130×4730	560	480	2725	4825	12	100-23	27	23

Specification Applications

Industries

HVAC and Industrial Ventilation – Controls airflow in heating, ventilation, air conditioning, and industrial systems.
Power Generation and Steel Mills – Regulates air and gas flow within ducts in power plants and steel mills.
Exhaust and Pollution Control – Manages exhaust gases and air in systems designed for emissions control, including flue gas desulfurization (FGD).
Chemical Processing and Corrosive Environments – Suitable for airflow management in chemical plants and environments with corrosive gases.
High-Temperature Applications – Ideal for use in applications exposed to high temperatures.

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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