News

In the harsh operating conditions of petrochemical, coal chemical, and power industries, control valve trims (valve cores, valve seats) act as the direct "commanders" of fluid flow. They face long-term challenges from high-speed erosion, particle wear, and cavitation. If the trim’s sealing surface fails, it can cause valve internal leakage, system shutdowns, or even safety accidents. That’s why surface hardening is a key technology to extend valve service life. Learn how to choose the right surface hardening process for control valve trims to reduce maintenance costs and extend service life.

Dear Valued Customers and Partners, Warm greetings from CNZPV! As the Chinese New Year approaches, we would like to inform you of our holiday schedule. Our company will be closed for the holiday from February 1, 2026, and will resume normal operations on March 1, 2026. Please note that our Sales and Production Departments will stop accepting new orders and halt production from January 20, 2026. We kindly request that you plan your orders and production needs accordingly to avoid any inconvenience.

In process industries such as oil & gas, chemical, and power generation, control valves play a pivotal role in regulating fluid flow, pressure, temperature, and level to ensure stable and efficient operation of production processes.

Dead Zone Can Quietly Undermine Your Control Loop—Opt for Valves That Respond to Signal Changes Within 1%,Top-tier Products Achieve 0.25%. In process control systems, a valve’s dead zone—the range of input signal changes that produce no corresponding movement—can silently degrade performance, leading to unstable control, increased wear, and energy waste. Even minor unresponsiveness in valve positioning can cause oscillations, reduced accuracy, and shorter equipment life.

In industrial fluid control systems, valve selection plays a critical role in determining both operational efficiency and long-term economic performance. The choice between fluorine-lined valves and high-performance alloy valves represents a significant technical and financial decision that requires careful analysis of multiple factors.

When selecting lined control valves (such as PTFE-lined, PFA-lined, or other fluoropolymer-lined valves) for corrosive or high-purity applications, quality is non-negotiable. Poor-quality valves can lead to leaks, premature failure, and costly downtime.To help you make an informed decision, here are 7 key quality indicators to evaluate when choosing a lined control valve.