700系列安全閥
700系列先導式安全閥是作為一個全金屬密封試驗和主閥。這擴展了先導高溫使用，是蒸汽和/或氣體的服務適合。
The Series 700 pilot operated safety valve is unique as an all metal seated pilot and main valve. This extends the use of pilot technology high temperatures and is suitable for steam and/or gas service.
Features & Benefits:
- All Metal-to-Metal Seating Surfaces – Trim specifically designed for high temperature service, plus enhanced chemical compatibility.
- Patented Flexible Disc – Reduces impact wear while increasing seat tightness.
- Dampened Trim – Dampening chambers control the opening and closing response, increasing valve cycle life.
- Non-Flowing Pilot – Reduces seat wear and minimizes entrance of dirt and particulates in the pilot.
- Adjustable Blowdown – Blowdown can be adjusted between 3% and 15% by turning the blowdown adjustment sleeve. Upper and lower blowdown rings and pins are not required, saving time, parts and costs.
- ASME Section VIII Code Stamp – Certified National Board capacities for steam and gas service assures user of independent third party flow rate verification.
- Unique Field Test Capability, this option allows accurate set pressure verification with valve in service. No system isolation block valve or rupture disc required.
700 Manifolded Dual Pilots* (Optional)
- For maximum operating conditions, it is recommended to use dual pilots with built-in switching mechanism.
- The safety lock allows the operator to isolate only one pilot while the active pilot protects the system.
- In-service testing and replacement of pilot under operating condition with full system protection.
Specifications
Sizes: 2" x 3" to 8" x 10"
Orifices: 0.503 to 26.0 in2 [3.245 to 167.7 cm2]
Inlet Ratings: ANSI Class 150 to 600
Temperature Range: Up to 1000°F [538°C]
Code: ASME VIII
