CIRCLE SEAL安全阀500系列
特征：Popoff or inline valves
可调开裂压力
零泄漏
可选出厂预设
准确的设定压力
开启压力范围广
防篡改调整
100% 阀座泄漏测试
大多数型号均可获得 PED 认证和 CE 标志
应用范围：
• 系统过压保护
• 储油罐
• Freon® 回收系统
• 医疗器材
• 制冷和加热设备
• 计量和分配泵
• 通讯设备
• 过程控制仪表
• 研发中试工厂
• 真空泵安全
技术数据
阀体材质 ：Aluminum, brass, 303 or 316 stainless steel
O-ring Materials Buna N, ethylene propylene, neoprene, silicone,
Teflon®, or Viton®
Spring Materials 302 stainless steel or 17-7 PH stainless steel
Operating Pressure Vacuum to 200 psig (14 bar)
CIRCLE SEAL安全阀5100 Series
直列式安全阀10 至2400 psig(0.7 – 165 bar)
特征零泄漏
高达开启压力的
95
%大多数型号
技术数据
车身结构材料 黄铜、钢、303 或 316 不锈钢
O 形圈材料 Buna N、乙烯丙烯、氯丁橡胶、
Teflon® 和 Viton®
弹簧材料 17-7 PH 不锈钢
工作压力 0 至 2400 psig (166 bar)
耐压 3600 psig (248 bar)
爆破压力 超过 5000 psig (345 bar)
温度范围 -320° F 至 +400° F（-196° C 至 +204° F）
基于 O 形圈材料，请参阅“如何订购”
连接尺寸 1/8˝ 至 1¼˝
注意：建议进行适当过滤以防止损坏密封表面。
CIRCLE SEAL 安全阀R6000 Series
提供低、中、高和超高压力型号，R6000 直角泄压阀门为用户提供高精度和开裂和复位压力的一致性。此外，压力范围（开启压力）为每个模型可以工厂根据客户预设规格。
PED认证和CE
标记是所有型号的标准。
全部 R6000安全阀提供多端连接以确保应用程序的多功能性。
特征
Low Pressure (5 – 550 psig)*
Zero friction poppets
• Increases accuracy of cracking pressure and reseat
pressure.
• Improves consistency of cracking pressure and reseat
pressure.
Encapsulated Seat Seal
• Maintains small contact surface area.
• Protects seat from erosion due to flow.
Raised seal lip on poppet minimizes contact with seat,
eliminating friction and preventing overstressing of the
O-ring
6 pressure spring ranges improve accuracy
Caps and bonnets are pre-drilled for lockwire
Multiple end connections available
High Pressure (150–6000 psig)
3 models available:
• Medium (150–2500 psig)—6 spring ranges improve
accuracy
• High (150–5000 psig)—7 spring ranges improve accuracy
• Extra High (5000–6000 psig)—one spring
Delta stem seal design prevents friction which increases
accuracy of cracking pressure and reseat pressure.
Balanced poppet design allows cracking pressure to
stay the same regardless of backup pressure.
Orifice sizes: 0.082”, 0.094”, 0.188”
Multiple end connections available.
Optional manual override handle
CIRCLE SEAL 安全阀5300 Series
Relief Valves400 to 10,500 psig (28 – 724 bar)
特征
Zero leakage up to 95% of cracking pressure
No chatter or squeal
Positive reseal at a high percentage of cracking pressure
No pressure rise with increasing flow
Externally adjustable
PED certifications and CE marking available for most models
技术数据
Body Construction Materials Brass, 303 or 316 stainless steel
O-ring Materials Buna N, neoprene, and Viton®
Poppet Materials • Liquid service: CRES 440C
• Gas service to 3074 psi: PCTFE
• Gas service above 3074 psi: Polyimide (Vespel®)
Retainer Stem 303 stainless steel
Seat Material 17-4 PH stainless steel
Spring Material 17-7 PH stainless steel
Backup Rings Teflon®
Operating Pressure 400 to 10,500 psig (28 to 724 bar); specify cracking
pressure
Proof Pressure • Gas: 4500 psig (PCTFE); 10,500 psig (Polyimide)
• Liquid: 16,000 psig
Burst Pressure • Brass: over 30,000 psig (2068 bar)
• Stainless steel: over 40,000 psig (2758 bar)
Temperature Range −65° F to +350° F (−54° C to +177° F)
Based on O-ring & body material, see “How to Order”
Connection Sizes • ¼˝ to ½˝ female pipe
• ¼˝ to 1˝ female tube
Note: Proper filtration is recommended to prevent damage to sealing surfaces.
CIRCLE SEAL 安全阀HP500 Series
高压和Inline Relief Valves150 至 575 psig (10 – 40 bar)
特征
Very accurate cracking pressure
Zero leakage up to 95% of cracking pressure
100% seat leakage tested
Tamper-proof adjustment
PED certifications and CE marking available for most models
Applications
• System overpressure protection
• Storage tanks
• Freon® recovery systems
• Medical equipment
• Refrigeration & heating equipment
• Measuring & dispensing pumps
• Communications equipment
• Process control instruments
• R & D pilot plants
技术数据：
Body Construction Materials Brass, 316 stainless steel
O-ring Materials Buna N, ethylene propylene, neoprene, silicone,
and Viton®
Spring Material 17-7 PH stainless steel
Poppet Brass, 316 stainless steel
Shroud Brass, 316 stainless steel
Operating Pressure • ¼˝ pipe: 150 to 575 psig (10 to 40 bar)
• ½˝ pipe: 150 to 450 psig (10 to 31 bar)
Temperature Range −65° F to +350° F (−54° C to +177° C)
Based on O-ring & body material, see “How to Order”
Connection Sizes ¼˝ to ½˝ male and female pipe
Note: Proper filtration is recommended to prevent damage to sealing surfaces.
CIRCLE SEAL 安全阀L500 Series
低压安全阀 0.2–15 psig产品特征：
Accurate cracking pressure
Eliminates sticking
In-line or vent to atmosphere with deflector cap
Adjustable cracking pressure
Zero leakage
Optional factory preset
技术数据：
Body Construction Materials Brass, 316 stainless steel
O-ring Materials Buna N, ethylene propylene, Kalrez®, neoprene, silicone, Viton®
Spring Materials 302 stainless steel
Cracking Pressure .2 psig to 15 psig
Operating Pressure 0 to 25 psig (1.72 BAR)
Inline Valve Proof Pressure 37.5 psig (2.59 BAR)
Inline Valve Burst Pressure Above 100 psig (6.89 BAR)
Temperature Range -70° F to +550° F (-57° C to +288° C)
Connection Sizes ¼” to ½”
Orifice Size 0.281˝
