077 Low Pressure
Relief / Back Pressure Reducing Regulators
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Relief / Back Pressure Regulators(NPT 1/4”)
077 Series is a 1/4” NPT type relief/back-pressure regulator suitable for water, chemical, liquid, gas, etc. Regulator’s body is made of brass (077B) or stainless steel 316L (077S) and 077 Series can be used for very low pressure of 0.3bar (5psig) up to 20 bar(290 psig). ★ 1/4” NPT type back-pressure regulator ★ Push and lock type handle (DRASTAR patent #10-1086199) mounted ★ Controlled pressure ranges: 0.2bar~2bar, 0.5bar~5bar, 1bar~10bar, 2bar~20bar ★ Panel mounting nut or wall mounting bracket as option ★ Design proof pressure: 150% of maximum rated ★ Applicable for water, chemical, liquid, gas, etc. ★ W077S-0000x-1S: W model is only for liquid or water With DRASTAR’s patented (patent #1086199) “push and lock type handle”, you can operate it easily and stably; “locking” by pushing down the handle will prevent any slight change of pre-set pressure value, which could possibly be caused by any vibration from gas pipeline or ambient applications and the other way “unlocking” by pulling it back enables you to adjust the pressure value freely again. [DRASTAR Regulators are Oil-free] DRASTAR’s all pressure regulators are assembled, cleaned, inspected, and packed in clean-rooms equipped with clean bench, helium detector, particle counter, ultrasonic cleaner, ultrapure water system, vacuum packaging machine, etc. through oxygen cleaning procedure in compliance with process and regulations indicated in CGA 4.1. and or ASTM G-93 and are free of any grease or oils. ※ Caution: Filtering (gas 7㎛ ~ 15㎛, water 15㎛ ~ 80㎛) is a MUST to use in the general gas application other than high purity gases. Otherwise, it may cause a failure to the regulators. It is strongly recommended to install filter for extension of life span and saving the maintenance expense. |
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※ Note: 1) (W) model is only for liquid and water.
2) H1, H2, H3 option is not available for brass products. ※Drastar's push and lock type handle (patent 10-1086199) is not applicable for aluminum control knob such as H1, H2, & H3 options.
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Specification
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Ports |
NPT 1/4" Female
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Design Proof Pressure |
150% maximun rated |
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Leak Rate Certification |
to 2 x 10 -8 atm cc/sec Helium available. |
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Body Materials |
077S-xxxA-1S Stainless steel 316L
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Bonnet Material |
Nickel Plated Brass (077SS / Stainless steel 316L Optional) |
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Diaphragm |
077S-xxxA-1S Stainless steel 316L
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Main Valve |
Stainless steel 316L |
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Valve Spring |
Stainless steel 316L |
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Valve Seat |
Teflon (Kel-F, Polyimide, etc.. Optional) |
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Outlet Pressure Ranges |
077S-002x-1S 2bar(25psi)
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Operating Temperature |
-40°C ~ +70°C (-40°F ~ +165°F) Standard
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Flow Capacity |
Cv = 0.2 Standard |
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Optional |
Inlet and Outlet Gauge etc.. |
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Weight |
1.0kg |
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