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Straight Check Valves

The QC Series series Check check valve can be calledis also known as the an upstream valve, non-return valve, backpressure, valve and or one-way valve, ; it is installed in support of automatic shutdown valves and safety devices. The main purpose is to prevent and protect the backflow medium against the consequences of unintended reverse flow.

Product Range

Rating Class 150 to 2500 JIS 10K to63K
Size 1/2” to 3”
Temperature 550°C, 1022°F
Leakage Rate API 598
Design Code API594

Small Space and Free Installation Position

Qublock straight check valves have a compact design that requires less installation space than other types of check valves. Furthermore, the valve is flexible in that it can be installed in either the vertical or horizontal position against a pipeline.

Spring Selection

A wide spring range ensures an optimum selection in accordance with the fluid conditions such as high pressure, high temperature, extreme corrosion, and slurry. This allows the valve to prevent chattering with the seat under severe conditions.

High-Pressure Range Ability

Qublock straight check valves have a wide pressure range with a massive forging body and can withstand up to 2500 lb, starting from 150 lb.  The QC series check valve can facilitate the safe operation of plants under high-pressure conditions.

Reversible and Renewable Seat

The reversible and renewable seat allows easy maintenance, low plant operating cost and effort, and long life cycle against harsh environments. The seat is easily reversible without any special tool requirements for renewed use.