LESER MODULATE ACTION SAFETY RELIF VALVE SERIES 433 PN 16 1410250 GGQ 40 GG 25 16:21

• BRAND: LASER
• ACTION SAFETY
• RELIF VALVE
• SERIES 433
• 433 PN 16 1410250
• GGQ 40 GG 25
• MADE IN USA

Product Description: LESER Modulate Action Safety Relief Valve, Series 433

The product you have is a Modulate Action Safety Relief Valve from LESER, a world-leading manufacturer of safety valves. This specific model is designed for precise and controlled pressure relief, primarily for gases and vapors.

Detailed Breakdown of the Model Code: 433 PN 16 1410250 GGQ 40 GG 25

Let’s decode the product number to understand its specifications:

• Series 433: This identifies the valve family. LESER Series 433 are “Modulate Action” safety valves. Unlike “Pop-Action” valves that open suddenly, modulate action valves open progressively in proportion to the overpressure. This is ideal for applications where a sudden loss of pressure or media is undesirable.

• PN 16: Pressure Nominal 16. This indicates the maximum allowable pressure at a reference temperature (usually 20°C / 68°F) for which the valve body is designed. PN 16 corresponds to approximately 16 bar or 232 psi.

• 1410250: This is the unique Type Number or Article Number. This number is used for ordering exact replacements and contains all the specific design details (like materials, spring range, and connections) in a single code.

• GGQ 40 GG 25: This section defines the connection sizes.

  • GGQ 40: The inlet connection is a G thread with a Quick-Connect coupling, size 40 (likely corresponding to DN 40, or ~1.5 inches).

  • GG 25: The outlet connection is a standard G thread, size 25 (corresponding to DN 25, or ~1 inch).

Key Features & Characteristics

1. Modulate Action (Proportional Opening):

   • The valve begins to open at the set pressure and opens progressively as the overpressure increases.

   • It closes tightly again as soon as the pressure drops back to a level close to the set pressure.

   • This minimizes media loss and prevents pressure surges in the system.

2. Application: Primarily designed for compressible fluids:

   • Gases (e.g., air, nitrogen, natural gas)

   • Vapors (e.g., steam)

   • It is not suitable for incompressible liquids like water or oil unless specifically certified for it.

3. Safety Function: It is a critical safety device designed to:

   • Protect pressurized equipment (e.g., vessels, tanks, pipelines, boilers) from overpressure.

   • Prevent catastrophic failure by automatically releasing excess pressure when a predetermined limit is exceeded.

4. High-Quality Construction: As a LESER product, it is built to stringent international standards (such as ASME, PED, AD-Merkblätter) ensuring reliability, durability, and precise performance.

SEO-Optimized Product Description

Title: LESER Series 433 Modulating Safety Relief Valve | PN 16 | GGQ 40 x GG 25

Meta Description: LESER Type 433 Modulate Action Safety Valve, PN 16. Designed for controlled pressure relief of gases & steam. Inlet: GGQ 40, Outlet: GG 25. Article No. 1410250. Ensures system safety and minimizes media loss.

Full Description:

The LESER Series 433 is a high-performance, modulate action safety relief valve engineered for precise overpressure protection in systems containing compressible media like steam, air, and other gases.

Featuring a proportional opening characteristic, the valve opens gradually in response to overpressure, ensuring a controlled discharge and a tight re-closure. This design is ideal for processes where system stability is critical and media conservation is important.

This specific model, Type 1410250, is built for a nominal pressure of PN 16 and features a GGQ 40 (DN 40) quick-connect inlet and a GG 25 (DN 25) threaded outlet. As a genuine LESER component, it guarantees compliance with major international safety standards and delivers reliable, long-term service in demanding industrial environments.

Key Benefits:

• Controlled Pressure Relief: Modulating action prevents system shock and minimizes media waste.

• High Reliability: Manufactured by LESER, a global leader in safety valve technology.

• Standard Connections: GG threaded connections for easy integration into existing piping.

• Equipment Protection: Safeguards valuable assets from dangerous overpressure conditions.

Typical Applications: Pressure vessels, steam boilers, compressed air systems, gas storage tanks, and process piping.