Axial flow:
Streamlined flow path through full-port expanded body avoids turbulence and prevents erosion and vibration. Process downtime and maintenance costs are eliminated.
Low Pressure loss:
The full opening flow passage and high-pressure recovery of the venturi-shaped body result in very low pressure loss: reduced operating cost of pumps and compressors.
Tight shut-off:
Tight shut-off is obtained by means of metal-to-metal sealing between the disc and the seat. This sealing is not affected by erosion and deformation of material (like with a soft seal).
Low Cracking Pressure:
The stability of a compressor system during startup benefits from a low cracking pressure. This is achieved with a large disc that has identical effective pressure areas on both sides (line contact sealing).
Easy opening and stable operation:
The low static pressure in the venturi-shaped throat area creates a pressure differential over the disc, resulting in easy opening. The axial check valve responds smoothly to changes in flow and remains stable when it is supposed to be.
Non-slam operation:
The spring-assisted design ensures ultra-fast closing with virtually no backflow and pressure surges in critical applications such as multi-pump systems or LNG trains.
Maintenance free:
Internal construction is based on the application of sound basic mechanical engineering principles. Consequently, Mokveld axial check valves do not require any maintenance.
Reliable performance prediction:
Both the pressure drop and the dynamic behaviour can be predicted with great accuracy, based on full-scale laboratory flow tests and a mathematical model developed in cooperation with a recognized fluid hydraulics laboratory.
Type Code:
TKZ-Y
Size- Pressure Class:
Size range at 2" - 84" inches/ Pressure Class at ASME 150 - 2500, or API 3000 - 10000
Deviations from above ranges upon Customer request (need to be specified)
Most common applications:
Waterworks and transmission systems, mains, loops, crossovers and tunnels
Pump discharge
Water hammer prevention
Potable and raw water
Cooling water systems
Excellent LNG check valve -
LNG train operators put the highest priority on production availability for a steady supply of LNG to meet the long term supply contracts (and prevent the high fines in case deliveries are delayed). To obtain this production availability the most reliable equipment for critical components is preferred. Non slam check valves are critical for the LNG process and Mokveld’s Non Slam Axial flow check valves are applied in most world class LNG trains.
In the LNG process the compressor train and cooling systems account for the biggest energy consumption. Therefore it is essential to minimize the pressure loss in the compressor trains and cooling water processes. The check valve selection and sizing is essential.
Mokveld Axial flow check valves are characterized by their large flow area and high pressure recovery design. Therefore Mokveld check valves offer the lowest pressure loss on the market. Mokveld provides an application specific valve sizing with pressure drop calculation for every valve, guaranteeing the lowest pressure loss and stable operation.
