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Flanged Industrial Safety Valve Le-ser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolled-in Seat

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Flanged Industrial Safety Valve Le-ser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolled-in Seat

Name: Flanged Industrial Safety Valve Leser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolledin Seat
Brand: Leser
Price: 1 USD

China Flanged Industrial Safety Valve Le-ser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolled-in Seat wholesale

Brand Name : Leser

Model Number : 431/433

MOQ : 1

Price : US $800.00 - 1500.00/ Unit

Payment Terms : T/T

Supply Ability : 1000 units per year

Delivery Time : 60-90 work days

Packaging Details : Wooden box + protection

Temperature : -270 to 450 °C | -454 to 842 °F

Body material : carbon steel

Narrowest flow diameter : 12 - 92 mm | 0.47 - 3.62 in

Bellows material (optional) : Stainless steel and elastomer

Set pressure : 0,2-40 bar | 2,9-580 psig

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LESER Type 431/433 Safety Relief Valve

Product Overview

The LESER Type 431/433 Modulate Action Safety Relief Valves are engineered for reliable pressure protection across a wide range of industrial applications. Designed to handle steam, gases, and liquids, these valves feature a proportional opening characteristic, minimizing medium loss and ensuring stable operation, particularly for medium mass flows.

Key Features

Proportional Opening: Large proportional range ensures stable operation and minimal medium loss.
Versatile Material Options: Available in gray cast iron, nodular cast iron, carbon steel, and stainless steel.
Wide Pressure Range: Handles pressures from 0.2 to 40 bar (2.9 to 580 psig), with PN 160 options up to 160 bar.
Robust Certifications: PED, AD 2000-Merkblatt A2, AQSIQ, EAC, and classification societies (LR, RINA, DNV GL, BV, ABS).
Flexible Connections: DIN EN 1092 (DN 15–150) and ASME B16.5 (NPS 1/2–6) flange options.
Low Maintenance: Self-draining angle-type body and single-part spindle reduce residue and corrosion.
Optional Accessories: O-ring soft seal, bellows, and metallic sealing plates for customized applications.
Fast Delivery: Standard configurations available in 2 weeks.

Technical Specifications

Parameter	Type 431/433	Type 431/433 PN 160
Set Pressure	0.2–40 bar (2.9–580 psig)	0.3–160 bar (4.35–2321 psig)
Temperature Range	-270°C to 450°C (-454°F to 842°F)	-270°C to 450°C (-454°F to 842°F)
Nominal Diameter at Inlet	DN 15–DN 150 (NPS 1/2–NPS 6)	DN 15 (NPS 1/2)
Actual Orifice Diameter (d₀)	12–92 mm (0.47–3.62 in)	12 mm (0.47 in)
Actual Orifice Area (A₀)	113–6648 mm² (0.175–10.3 in²)	113 mm² (0.175 in²)
Flange Rating Inlet	PN 16–PN 40, ASME Class 150–300	PN 63–PN 160, ASME Class 300–600
Body Material	0.6025, 0.7043, 1.0619, 1.4408 (Gr. 60-40-18, SA 216 WCB, SA 351 CF8M)	1.0619, 1.4408 (SA 216 WCB, SA 351 CF8M)
Bellows Material (Optional)	Stainless steel, elastomer	Stainless steel
Seat Gasket	Metallic, sealing plate, O-ring	Metallic, sealing plate, O-ring
Load Type	Spring-loaded	Spring-loaded

Applications

The LESER Type 431/433 valves are designed for reliable pressure relief in various industries:

Chemical Industry: Protects recycling facilities and waste gas purification systems.
Oil and Gas: Ensures safety in upstream and downstream processes with thermal expansion protection.
Power Generation: Manages pressure in heat-transfer oil systems and steam applications.
Water Treatment: Safeguards pipeline segments and sealed storage tanks.
Machine Building: Supports piston compressors and hydraulic systems with pulsating pressures.

Frequently Asked Questions

What fluids can the Type 431/433 handle?

These valves are suitable for steam, gases, and liquids, per AD 2000-Merkblatt A2 standards.

Are the Type 431/433 valves suitable for high-pressure applications?

Yes, the PN 160 variant supports pressures up to 160 bar (2321 psig).

What certifications do these valves have?

They are certified to PED, AD 2000-Merkblatt A2, AQSIQ, EAC, and classification societies like LR, RINA, and DNV GL.

Can the valves be customized?

Yes, options include O-ring soft seals, bellows, and metallic sealing plates for specific applications.

How do the valves ensure low maintenance?

The self-draining angle-type body and single-part spindle design reduce residue and corrosion.

For more information about the LESER Type 431/433 Safety Relief Valves, pricing, or to request a demo, contact our team:

Email: edward.zhao@gongboshi.com
Phone: +8615000725058
Website: https://www.shgongboshi.com/

Flanged Industrial Safety Valve Le-ser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolled-in Seat Images

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Flanged Industrial Safety Valve Le-ser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolled-in Seat

Flanged Industrial Safety Valve Le-ser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolled-in Seat

Flanged industrial safety valve

Medium flow safety relief valve

Rolled-in seat safety valve

Flanged Industrial Safety Valve Le-ser Type 431 433 Standard Medium Flow Liquid Pressure Safety Relief Valves with Rolled-in Seat Images