Circle Seal Controls - 流体控制产品提供各种手动关闭阀，包括塞式、三通选择器、微型、气动、微计量指尖、手套和角型。主体材料包括 303 和 316 不锈钢和黄铜。Features
• Zero leakage
• Protected o-ring
• Full fl ow passages
• Freedom from wire drawing
• Panel mount standard
• Hand wheel or toggle handle
Technical Data
Body Construction Material 316 or 303 stainless steel
Stem Materials 316, 303 or 17-4 PH stainless steel
Gland Nut Materials Brass or 17-4 PH stainless steel
O-ring Materials Buna N, Neoprene or Viton®
Spring Material 302 stainless steel
Handle Materials • Handle wheel: die-cast zinc, color blue
• Toggle: forged steel, cadmium-plated
Leakage • Internal: zero
• External: zero
Operating Pressure 0–6000 psig (414 bar)
Proof Pressure 9000 psig (621 bar)
Burst Pressure Over 24,000 psig (1,655 bar)
Temperature Range −40° F to +350° F (−40° C to +177° C)
Based on o-ring material, see “How to Order”.
Connection Sizes ¼˝–3⁄8˝
Actuating Force • 900 Series: 20in/lbs
• T900 Series: 20 lbs
Note: Proper fi ltration is recommended to prevent damage to sealing surface.
How it Works
Closed
O-ring seal on smooth fi nish of
stem provides leak-tight shutoff . Pressure on o-ring increases sealing eff ectiveness.
Opening
As stem is withdrawn, fl oating
sleeve moves into position
protecting the o-ring. Flow
starts after 1½-turns of the
handle.
Throttling
O-ring is protected by sleeve.
Throttling is controlled across
tapered section of the stem.
Full Open
Stem is withdrawn, permitting
full fl ow with minimum pressure drop
