动上展阀产品概述

气动上展阀是一种采用气动执行机构驱动的特殊结构阀门，通过阀杆的垂直升降运动实现流体的通断控制。该产品采用"上展式"设计（阀瓣向上开启），特别适用于含有固体颗粒、高粘度或易结晶介质的工况，广泛应用于化工、冶金、污水处理等行业。

气动上展阀核心技术特点：

气动上展阀独特结构设计

上展式阀瓣结构（阀瓣向上开启）

无滞留区设计，防止介质堆积

阀杆导向结构确保运行平稳

气动上展阀密封性能：

金属硬密封（限耐温600℃）

可选软密封（PTFE）实现零泄漏

自清洁式阀座设计

气动上展阀执行机构：

气动活塞式/薄膜式执行器

可选单作用（弹簧复位）或双作用

防爆型（Ex dⅡCT6）可选

气动上展阀特殊工况适应：

耐磨阀瓣设计（可堆焊硬质合金）

防结晶加热夹套可选

适用于真空至4.0MPa压力范围

气动上展阀安全与维护

阀杆防飞出结构

气动上展阀在线维护设计

符合API 598密封测试标准

气动上展阀关键术语对照表：

中文English上展式结构Rising stem design无滞留区No stagnant zone自清洁阀座Self-cleaning seat防结晶夹套Anti-crystallization jacket阀杆防飞出Stem blow-out proof硬质合金堆焊Hard-faced alloy

注：可根据实际需求补充材料标准（如ASTM A216 WCB）或特殊认证（如SIL2）。

Pneumatic Rising Stem Valve Product Overview

The pneumatic rising stem valve is a specially designed valve with pneumatic actuation, featuring vertical stem movement for fluid shut-off. Its "rising" design (disc lifts upward) makes it ideal for handling media with solids, high viscosity crystallization tendency, widely used in chemical, metallurgical wastewater treatment industries.

Core Technical Features:

Unique Structural Design

Rising stem design (disc lifts upward)

No stagnant zone to prevent media accumulation

Guided stem ensures smooth operation

Excellent Sealing Performance

Metal hard seal (up to 600℃)

Optional soft seal (PTFE) for bubble-tight shut-off

Self-cleaning seat design

Reliable Actuation

Pneumatic piston/diaphragm actuators

Single-acting (spring return) double-acting options

Explosion-proof (Ex dⅡCT6) available

Special Application Adaptability

Wear-resistant disc (hard-faced alloy optional)

Anti-crystallization heating jacket

Suitable for vacuum to 4.0MPa pressure range

Safety & Maintenance

Stem blow-out proof structure

Online maintenance capability

Complies with API 598 seal test standard