The problem

Switch life tests done by manual pumping and hand counting miss drifting actuation points; fast shock and slow ramp duty cannot both be covered by one rig.

Capability

Endurance bench for high-pressure and low-pressure switch make-break life tests. Ten stations with independently settable on and off times (0-9999s), counts (0-999999) and make/break pressures (0-0.4MPa); two modes - fast shock (quick high-low switching) and slow ramp (gradual rise and fall across the set band); VFD pump gives constant-pressure feed of 30L/min at 4bar from an 80L SS304 tank with float level protection; pressure collected by transmitters (0.25 percent F.S) and uploaded to the PLC; contacts wired through quick connectors so the PLC judges make-break by IO state, pneumatic angle-seat valves control the pressure source; the screen shows mode, make and break pressures, cumulative counts, timings and verdicts; all wetted parts SS304, piping rated 5MPa, water and electricity separated. Weinview touch screen with Mitsubishi FX3U PLC.

Applicable standards

Per customer technical agreement; make-break life and actuation-pressure verification of high and low pressure switches

Key specifications

• 用途：高压/低压压力开关通断寿命与动作压力验证
• 工位：10工位，各工位通断时间、计数、压力独立可调
• 通断时间：接通/断开各0~9999s；计数0~999999次
• 接通/断开压力：0~0.4MPa可调（恒压供水0.4MPa升压）
• 测试模式：快速冲击（高低压快速切换）/缓压升降切换，双模式
• 恒压供水：变频水泵30L/min、4bar；80L不锈钢水箱+浮球水位保护
• 采集：压力变送器±0.25%F.S上传PLC；触点IO状态判定通断
• 结构：涉水件304不锈钢；管路耐压5MPa；水电分离
• 控制：威纶触摸屏+三菱FX3U PLC；气动角座阀

Applications

Make-break life tests at pressure-switch plants for air conditioners and water heaters; incoming verification and reliability sampling at appliance makers; third-party laboratories

About the manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd provides non-standard customization, drawing confirmation, factory acceptance, on-site installation and commissioning, operation training and lifetime technical service; 12-month warranty and lifetime spare parts supply. Tel: 0760-88500902 / 13416787649. Web: en.zsnaili.com.