强酸强碱的输送与精确控制，是化工、制药及环保水处理中的长期难题。普通金属阀可能出现穿孔、密封失效和寿命骤降，增加维护费用与泄漏风险。EGSC-B型酸阀围绕防腐、防漏、长寿命进行设计。
PTFE波纹管密封
阀杆是常见外漏部位。PTFE波纹管隔离阀杆区域与外部环境，限制有毒、有害或高价值酸性流体沿阀杆外泄。
整体内衬工艺
PVC或PTFE材料整体镶嵌于阀体，避免介质直接接触金属。阀芯与阀座使用PTFE，抵抗多种强酸碱；内置式法兰使结构合理，并保留金属外壳的机械强度，实现承压能力与耐腐蚀性的结合。
低阻力运行
加注润滑液装置降低频繁调节时的阀杆摩擦，使启闭与调节顺畅，改善控制响应，降低执行机构负荷。
规格
口径DN15–DN50，压力PN10/PN16/ANSI Class 150，温度−20°C至100°C，泄漏等级IV，等百分比特性，法兰连接。阀体材料CF8+PVC或CF8+PTFE，阀芯阀座PTFE。
工况配套
盐酸、硫酸输送及酸碱中和等工序，应根据实际参数匹配薄膜执行机构和定位器。欢迎获取技术图纸、报价及选型支持。山东龙飞机电设备有限公司，济南市经十东路16888号C3北，电话0531-88263858 / 88013051 / 88110763 / 88165149，官网http://www.e-lonfly.com.cn。
产品规格表
| 参数 | 原文规格 |
|---|
| 型号 | EGSC-B acid valve |
| 标准 | GB/T 4213-2024, effective July 1, 2025; HG/T 20592/20615-2009; ANSI/ASME B16.5-2009 |
| 口径 | DN15–DN50 |
| 压力等级 | PN10 / PN16 / ANSI Class 150 |
| 温度范围 | −20°C to 100°C |
| 泄漏等级 | IV |
| 阀体材料 | CF8+PVC或CF8+PTFE |
| 阀芯与阀座 | PTFE |
| 流量特性 | 等百分比 |
| 连接 | 法兰 |
| 执行机构与附件 | Diaphragm actuator, electropneumatic or smart positioner, filter regulator |
Transporting and accurately controlling strongly corrosive acids and alkalis is a persistent challenge in chemical production, pharmaceutical synthesis and environmental water treatment. Prolonged exposure can cause conventional metal valves to suffer body perforation, seal failure and shortened life, increasing maintenance costs and the risk of leakage.
The EGSC-B acid valve addresses these applications through material selection and structural design. Its three principal aims are corrosion protection, leakage prevention and long service life.
1. PTFE bellows sealing
The stem seal is a common leakage point in a control valve. The EGSC-B uses a PTFE bellows to isolate the stem region from the external environment. This arrangement is intended to prevent toxic, hazardous or valuable acidic fluid from escaping along the stem.
2. An integrated corrosion-resistant lining
PVC or PTFE material is fitted inside the body rather than leaving the process fluid in direct contact with metal.
- Plug and seat: PTFE construction provides resistance to a range of aggressive acids and alkalis.
- Body construction: an internal flange arrangement produces a compact, rational assembly while retaining the mechanical strength of the metal shell. The design combines metal pressure containment with fluoropolymer chemical resistance.
3. Low-resistance stem movement
A lubrication-filling provision reduces friction during frequent regulation. Smoother opening, closing and adjustment improve control response and reduce the load on the actuator.
Technical specifications
| Parameter | Published specification |
|---|
| Model | EGSC-B acid valve |
| Standards | GB/T 4213-2024, effective July 1, 2025; HG/T 20592/20615-2009; ANSI/ASME B16.5-2009 |
| Nominal size | DN15–DN50 |
| Pressure rating | PN10 / PN16 / ANSI Class 150 |
| Temperature range | −20°C to 100°C |
| Leakage class | IV |
| Body materials | CF8 with PVC or CF8 with PTFE |
| Plug and seat | PTFE |
| Flow characteristic | Equal percentage |
| Connection | Flanged |
| Actuation and accessories | Diaphragm actuator, electropneumatic or smart positioner, filter regulator |
The available sizes suit smaller flow duties as well as industrial production. The equal-percentage characteristic provides a useful control range, while the pressure and connection options support common piping arrangements.
Application-based selection
The EGSC-B is part of a complete fluid-control solution. For hydrochloric or sulfuric acid transfer, acid–alkali neutralization or other corrosive duties, the actuator and positioner are matched to the actual process requirements.
Contact us for application advice, technical drawings and quotations. Company: Shandong Longfei Electromechanical Equipment Co., Ltd. Website: http://www.e-lonfly.com.cn Address: North side of Building C3, No. 16888 Jingshi East Road, Jinan. Telephone: 0531-88263858 / 88013051 / 88110763 / 88165149.
