Swagelok® Relief Valves
Swagelok® proportional relief valves provide overpressure protection in general industrial applications with a variety of set pressures available. Bleed and purge valves provide effective bleeding, venting, or draining of signal line pressure to atmosphere.
View Relief ValvesSwagelok® R series proportional relief valves open gradually as pressure increases, providing simple, reliable overpressure protection, protecting workers, and helping to maintain proper process conditions. Set pressures can be configured at the factory or easily adjusted in the field to suit changing operating conditions. Swagelok® RV series medium-pressure relief valves can be used in applications with operating pressures up to 20 000 psig (1378 bar).
Swagelok® PRV series proportional safety relief valves are certified to PED 2014/68/EU Category IV and CE-marked in accordance with the Pressure Equipment Directive as a safety valve according to ISO-4126-1. They are factory-set, tested, locked, and tagged with the set pressure.
Swagelok® BV series bleed valves can be used on instrumentation devices such as multivalve manifolds or gauge valves to allow safe removal of instruments and to assist in the calibration of control devices. They are available with low emission (Low-E) certification according to API 624 to combat fugitive emissions.
Swagelok® P series purge valves are manual bleed, vent, or drain valves. Knurled caps are permanently assembled to valve bodies for safety, and both bleed and purge valves are compact for convenient installation.
Want to know more about relief, bleed, or purge valves?
Relief Valve Categories
Bleed and Purge Valves, BV and P Series
Experience convenient installation with compact bleed valves for instrumentation devices and purge valves, such as manual bleed, vent, or drain valves.
Medium-Pressure Relief Valves, RV Series
Ensure over-pressure protection in general-industry applications with set or adjustable pressure and lock nut for stability.
Proportional Relief Valves, R3, R4, RL3, and RL4 Series
Discover high- and low-pressure proportional relief valves that open gradually as pressure increases. Suitable for liquid or gas service.
Proportional Safety-Relief Valves, PRV Series
Provides flexible, reliable over-pressure protection, certified under PED 2014/68/EU Category IV, and CE-marked according to ISO-4126-1.
Spare Parts and Accessories
Find spare parts and accessories for relief valves, including spring kits, seal kits, handle kits, insert kits, and poppet kits for optimal performance.
Relief Valves Catalogs
Locate detailed product information, including materials of construction, pressure and temperature ratings, options, and accessories.
Features: Gas and liquid service; Working pressure: 6000 psig (413 bar); Set pressures from 145 to 6000 psig (10.0 to 413 bar); All 316L stainless steel construction; 1/4 through 1 in. NPT and ISO/BSP parallel thread end connections; Certified to PED 97/23/EC Category IV
Bleed Valves: Working pressures up to 10 000 psig (689 bar); Temperatures up to 850°F (454°C); 316 stainless steel, carbon steel, alloy 400, or alloy C-276 materials. Purge Valves: Working pressures up to 4000 psig (275 bar); Temperatures up to 600°F (315°C); 316 stainless steel, brass, or carbon steel materials
Features: Liquid or gas service; Set pressures from 10 to 6000 psig (0.68 to 413 bar); 1/4 and 1/2 in. and 6 to 12 mm end connections
Swagelok offers pressure-reducing, back-pressure, dome-loaded, and spring-loaded pressure regulators to control pressure and minimize droop in instrumentation systems.
Swagelok® offers medium- and high-pressure fittings, tubing, valves, and related accessories with temperatures up 1000°F (537°C), pressure ratings up to 60 000 psig (4134 bar) in sizes ranging from 1/4 to to 1 in. for medium-pressure products and 1/4 to 9/16 in. for high-pressure products. NACE® MR0175/ISO15156 compliance is available.
Calculate Flow Rate for the Right Valve Selection
Use our valve flow coefficient (Cv) calculator to chose a valve sized correctly for your needs.
Use the ToolSwagelok Resources Curated for You
How to Select the Right Valves for Your Industrial Fluid System
Learn how to apply the practical STAMPED method to select the valves most suited to your industrial fluid or sampling system design applications.
借助低漏率阀可尽可能地减少逸散性排放的成本
逸散性排放问题在化工和石油精炼行业中日益受到关注。通过认证的低排放 (Low-E) 阀可以保护您的设施和利润。在这篇文章中了解何为低排放、如何对其进行测试以及低排放如何为您提供帮助。
如何使用截止阀隔离工业流体系统
在维护之前，隔离工业流体系统管路对于工厂安全至关重要。隔离流体系统管路的安全方法之一是安装两个截止阀。了解如何为系统设计正确的配置。
一种全新的阀门。该阀可能改变半导体制造的三大原因
了解原子层沉积 (ALD) 阀门技术的创新如何改变高科技半导体制造商的游戏规则。
比例卸荷阀、排放和吹扫阀
比例卸荷阀
凭借从 10 至 6000 psig（0.7 至 413 bar）的设定压力范围，R 系列比例卸荷阀可为各种液体或气体一般工业应用提供简单可靠的过压保护。这种阀门会随着压力的升高而逐渐打开，并在系统压力降至设定压力以下时关闭。设定压力可以在出厂时设置，也可以在现场轻松调节。作为符合 ISO-4126-1 标准的安全阀，PRV系列比例安全卸荷阀已通过 压力设备指令的 PED 2014/68/EU IV 类 CE 认证，并在设定压力下进行了出厂设置、测试、锁定和挂牌。
排放和吹扫阀
世伟洛克排放阀可应用于仪表装置（如多阀阀组或压力表阀），以便在拆除仪表之前将引压信号管线压力排放到大气中或协助校准控制装置。NPT 和 SAE 外螺纹端接可供选择。吹扫阀是带有 NPT、SAE、世伟洛克卡套管接头或卡套管转换接头端接的手动排放、放空或排空阀。为安全起见，滚花帽永久地被装配在阀体上。排放和吹扫阀均结构紧凑，便于安装。