advance check valves

Nozzle Check Valves (NZ-Series) – Axial Flow, Zero-Leak Performance Advance NZ-Series Nozzle Check Valves are a next-generation solution in non-return valve technology, engineered for critical applications requiring high efficiency, reliability, and zero leakage. These axially operated, non-slam valves are designed using advanced 3D modeling and computational fluid dynamics (CFD), validated through rigorous testing to ensure optimal performance in demanding conditions. Unlike conventional check valves, the NZ-Series features a streamlined flow path with a specially engineered teardrop-shaped venturi design. This allows smooth, unrestricted fluid movement, resulting in higher flow rates and minimal pressure drop, which significantly reduces energy losses and improves overall system efficiency. These valves operate automatically without the need for external actuation. Their quick response to flow reversal prevents backflow instantly, eliminating water hammer and ensuring silent, vibration-free operation. The metal-to-metal seating guarantees tight shut-off and zero seat leakage, making them ideal for high-pressure and high-temperature applications. Built for durability, NZ-Series valves offer low failure rates, require virtually no maintenance, and ensure long service life even in large-scale gas and liquid pipeline systems. Key Features: Designed as per ANSI B16.34 standards Axial flow, non-slam operation Self-operated (no external power required) High flow coefficient (Cv) with low pressure drop Quick response to flow direction changes Metal seated for tight, zero-leak shut-off Standard double flanged body, other end connections available Zero emission design Maintenance-free and highly reliable These nozzle check valves are ideal for critical process industries such as oil & gas, power generation, petrochemicals, and large HVAC systems where efficiency, safety, and performance are paramount.

Dual Plate Check Valves – High Efficiency Non-Return Solution Dual Plate Check Valves are advanced non-return valves designed to overcome the limitations of traditional swing and lift check valves. With a compact, lightweight, and robust construction, these valves offer superior performance while occupying significantly less space in piping systems. The valve features two spring-loaded plates mounted on a central hinge pin. As fluid flows, the plates open smoothly, and when the flow decreases, they close instantly using torsion spring action—without requiring reverse flow. This intelligent design ensures non-slam operation and completely eliminates water hammer effects, making it ideal for sensitive and high-performance systems. Due to its silent operation, it is also known as a Silent Check Valve or Wafer Check Valve. Designed for versatility, these valves are suitable for a wide range of industries including oil & gas, petrochemical, HVAC, and power plants. They are available in both soft seated and metal-to-metal seated configurations, allowing use in low as well as extreme temperature and pressure conditions. Key Features: Size range from 2” to 120” Pressure ratings from ANSI Class 125 to Class 2500 API 6A range from API 5000 to API 10000 Suitable for temperature range -196°C (cryogenic) to 900°C (fire-safe applications) Available in Wafer, Double Flanged, Lugged, Butt Weld, Hub Ended, and RTJ designs Optional Jacketed and Cladded body constructions Fugitive emission-free, retainer-less design Optimized spring for over 1 million cycles Zero velocity non-slam closure Eliminates valve-induced water hammer Compliance with API 594, API 598, API 6D, BS 6364, API 6FA standards Dual Plate Check Valves provide a reliable, maintenance-friendly, and energy-efficient solution for preventing backflow while ensuring smooth and quiet system operation.

Pre-Insulated Check Valves – Efficient & Ready-to-Install Flow Protection Pre-Insulated Check Valves from Advance are designed to provide reliable backflow prevention while minimizing heat loss and installation effort in HVAC and industrial piping systems. These valves come with factory-applied insulation, eliminating the need for on-site insulation work and ensuring consistent thermal performance. The insulation material used is Polyisocyanurate (PIR) with a density greater than 70 kg/m³, offering excellent thermal efficiency across a wide operating temperature range of -40°C to 120°C. The insulation is protected with a durable HDPE cladding, which safeguards against mechanical damage, moisture ingress, and peeling, thereby extending the lifespan of the valve system. Optional aluminium cladding is also available based on project requirements. From a safety standpoint, the insulation meets Class P fire performance standards as per H5476 Part 5, with low flame spread and self-extinguishing properties. This makes the valves suitable for use in critical environments where fire safety is essential. The design ensures that all mounting bolts are fully enclosed within the insulation, while still allowing standard flanges and fasteners to be used without modification. Bolts are tightened directly on the metal flange surface, maintaining proper joint integrity and simplifying installation. Valve Range: Dual Plate Check Valves Sizes from 50 mm (2”) to 600 mm (24”) These pre-insulated check valves provide a cost-effective, energy-efficient, and low-maintenance solution for modern HVAC systems, district cooling networks, and industrial applications requiring dependable flow control and thermal efficiency.