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冬斯-压力调节器

FRI/6 平衡型压力调节器将压力调节器和 50 微米气体过滤器组合在一个外壳中。使用 FRI/6 与大多数 DMV 截止阀可以进行各种组合，以形成紧凑的模块化系统：

- 带螺纹法兰的单独式压力调节器和气体过滤器，或直接安装到 DMV 尺寸 701、702 和 703 系列安全截止阀上。

- 通过直接安装 A2 型压力开关监控调节器输出压力。检测入口和出口压力的附加端口也位于螺纹法兰上。

- 重型隔膜结构，具有耐用性和强度。

- 出口压力的稳定、精确和瞬时调节。

- 锁定式调节器（详见第 2 页和第 3 页）。

- 工厂安装的排气限制器。查看排气管要求的适用规范。

应用 FRI/6 压力调节器推荐用于工业和商业加热应用，适用于天然气、丙烷、丁烷、空气和惰性气体。适用于按体积计高达 0.1 % 的干燥 H2 S。

“干燥”气体的露低点低于 +15 °F，其相对湿度低于 60 %。

规格数据参数
Body sizes Flanges	FRI 705/6 - FRI 707/6	FRI 710/6 - 712/6
	1/2" - 1" NPT or Rp	1" - 2" NPT or Rp
Max. operating pressure	7 PSI (500 mbar) UL and CE
	5 PSI (350 mbar) CSA
Max. body pressure	15 PSI (1000 mbar)
Input pressure range	2 in. W.C. to 200 in. W.C. (5 mbar to 500 mbar)
Output pressure range	1 in. W.C. to 60 in. W.C. (2.5 mbar to 150 mbar); adjustable with different springs Actual outlet pressure is +/- 15 % of set pressure (15 % hystersis/droop)
Materials in contact with gas	Housing:	Aluminium
	Seals and diaphragms:	NBR-based rubber
Ambient temperature rating	+5 °F to +150 °F for up to 7 PSI for regulating behavior (+/- 10 % of setpoint).
	-40 °F to +150 °F: Diaphragms are suitable for the low temperature, but there may be out of range regulating behavior.
	CSA Certified for -40 °F to +150 °F for up to 5 PSI.
	-15 °C to +70 °C applies to the CE Marking.
Installation position	Regulator dome from vertically upright to lying horizontally
Test ports/ Pressure switch mounting ports	One G 1/8 ISO 228 test ports on each side of regulator, sensing downstream pressure, and one on each inlet and outlet flange (if used as a stａnd alone regulator).
Gas filter (standard)	50 micron; replaceable
Vent line / Back loading port/ Breathing plug	Vent line connection is G 1/4 ISO 228. The FRI also has a factory installed vent limiter, which limits the escape of gas to less than 0.5 CFH @ 5 PSI in case atmospheric diaphragm ruptures. Venting required unless otherwise accepted by the authority having jurisdiction.
Hysteresis/Droop	Hysteresis is less than 10 % for up to 7 PSI inlet.
	Average droop at 20:1 turndown is 10 % for up to 7 PSI.