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valign="top" style="visibility: visible;"><section>隔膜压力表</section></td><td valign="top" style="visibility: visible;"><section>普通压力表</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>接触介质部分</section></td><td valign="top" style="visibility: visible;"><section>隔离膜片（金属或特氟龙等耐腐蚀材料）</section></td><td valign="top" style="visibility: visible;"><section>弹簧管（波登管）直接接触介质</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>内部填充物</section></td><td valign="top" style="visibility: visible;"><section>填充液（如硅油、甘油）传递压力</section></td><td valign="top" style="visibility: visible;"><section>无填充液，弹簧管直接形变测压</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>密封性</section></td><td valign="top" style="visibility: visible;"><section>全密封结构、介质与内部机构完全能隔离</section></td><td valign="top" style="visibility: visible;"><section>介质直接进入弹簧管，无隔离结构</section></td></tr></tbody></table><br/></section></section><section><section><section><section><section>2、适用场景对比</section></section><section><section></section></section></section></section><section><section><table><tbody style="visibility: visible;"><tr style="visibility: visible;" class="firstRow"><td valign="top" style="visibility: visible;"><section>场景</section></td><td valign="top" style="visibility: visible;"><section>隔膜压力表</section></td><td valign="top" style="visibility: visible;"><section>普通压力表</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>腐蚀性介质</section></td><td valign="top" style="visibility: visible;"><section>✔强酸、强碱、化学溶剂等</section></td><td valign="top" style="visibility: visible;"><section>易腐蚀弹簧管，导致损坏</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>高粘度/易结晶介质</section></td><td valign="top" style="visibility: visible;"><section>✔泥浆、胶体、糖浆等（膜片隔离防堵塞）</section></td><td valign="top" style="visibility: visible;"><section>易堵塞导压孔或弹簧管</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>卫生要求高</section></td><td valign="top" style="visibility: visible;"><section>✔食品、医药行业（避免介质污染）</section></td><td valign="top" style="visibility: visible;"><section>结构缝隙可能滋生细菌</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>极端温度</section></td><td valign="top" style="visibility: visible;"><section>✔高温或低温介质（通过填充液缓冲）</section></td><td valign="top" style="visibility: visible;"><section>温度变化易影响弹簧管精度</section></td></tr><tr style="visibility: visible;"><td valign="top" style="visibility: visible;"><section>常规环境</section></td><td valign="top" style="visibility: visible;"><section>✘性价比低</section></td><td valign="top" style="visibility: visible;"><section>水、空气、油等普通介质</section></td></tr></tbody></table><p><br/></p></section></section></section><section><section><section><section><section>3、优缺点对比</section></section><section><section></section></section></section></section><section><section><table><tbody style="visibility: visible;"><tr style="visibility: visible;" class="firstRow"><td valign="top" style="visibility: visible;"><section>特性</section></td><td valign="top" style="visibility: visible;"><section>隔膜压力表</section></td><td valign="top" style="visibility: visible;"><section>普通压力表</section></td></tr><tr><td valign="top"><section>优点</section></td><td valign="top"><section>耐腐蚀、防堵塞、适应恶劣介质、安全性高</section></td><td valign="top"><section>结构简单、成本低、维护方便</section></td></tr><tr><td valign="top"><section>缺点</section></td><td valign="top"><section>价格高、填充液可能受温度影响，耐受能力较低</section></td><td valign="top"><section>易受介质腐蚀、不适用特殊环境</section></td></tr></tbody></table><p><br/></p></section></section></section><section><section><section><section><section>4、工作原理差异</section></section><section><section></section></section></section></section><section><section><p>·隔膜压力表：</p><p>介质压力→隔离膜片变形→填充液传递压力→弹簧管变形→指针显示压力值</p><p>·关键点：膜片隔离介质，避免直接接触内部元件</p><p><br/></p><p>·普通压力表：</p><p>介质直接进入弹簧管→弹簧管自由端变形→带动齿轮机构→指针显示压力值</p><p>关键点：介质与测量元件无隔离，直接作用。</p><p><br/></p></section></section></section><section><section><section><section><section>5、选型建议</section></section><section><section></section></section></section></section><section><section><p>·选隔膜压力表：</p><p>·介质具有腐蚀性、高粘度、易结晶或高温</p><p>·卫生要求严格（如食品、制药行业）</p><p>·需防止介质泄露（如有毒、有害物质）</p><p>·选普通压力表：</p><p>·测量水、空气、油等非腐蚀性介质</p><p>·常温常压环境、预算有限</p><p>·无特殊防堵或卫生要求</p><p><br/></p></section></section></section></section></section><section><section><section><section>总结</section></section><section><section><br/></section><section><section><section><p>隔膜压力表通过“膜片隔离”保护内部元件，专为腐蚀、粘稠、高温等恶劣工况设计；普通压力表结构简单，适合常规介质和低成本场景。</p><p 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