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Gas & Liquid Control Technology with DRASTAR

Products

077 Low Pressure

Relief / Back Pressure Reducing Regulators

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  Products Feature

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.

  Ordering Information.

(W) 077 S - 002 A - 1S H - H1
BASIS
SERIES
NUMBER 		BODY
MATERIAL 		CONTROLLED
PRESSURE
RANGE 		PORTS INLET
OUTLET
PORTS SIZE 		DIAPHRAGM
MATERIAL 		HIGH
TEMPE-
RATURE
077 Series S = Stainless
     Steel 316L


002 = 2bar(30psi)

005 = 5bar(72psi)

010 = 10bar(145psi)

020 = 20bar(290psi)  

 


A = 2Ports
L = 3Ports
C = 4Ports
R = 3Ports
M = 4Ports



*Previous*
2 = 2Ports
3 = 3Ports
 

 

 


1 = NPT 1/4"
S = Cv 0.2
  Standard

 


*Previous*
NP4 = NPT1/4"  

Stainless
steel 316L
Standard


H = C22
(Hastelloy)
Optional  

 

 

H1 = 120°C

H2 = 250°C

H3 = 320°C

 

 Optional                     

※ 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.

Specification  

 

 Ports

 NPT 1/4" Female
 077S-xxxA-1S   2-Ports
 077S-xxxL-1S   3-Ports
 077S-xxxC-1S  4-Ports

 Design Proof Pressure

 150% maximun rated

 Leak Rate  Certification

 to 2 x 10 -8 atm cc/sec Helium available.

 Body Materials

 077S-xxxA-1S   Stainless steel 316L
 077B-xxxA-1S   Nickel Plated Brass

 Bonnet Material

 Nickel Plated Brass (077SS / Stainless steel 316L Optional)

 Diaphragm

 077S-xxxA-1S   Stainless steel 316L
 077S-xxxA-1SH   Hastelloy-C22 Optional

 Main Valve

 Stainless steel 316L

 Valve Spring

 Stainless steel 316L

 Valve Seat

 Teflon (Kel-F, Polyimide, etc.. Optional)

 Outlet Pressure  Ranges

 077S-002x-1S   2bar(25psi)
 077S-005x-1S   5bar(70psi)
 077S-010x-1S   10bar(145psi)
 077S-020x-1S   20bar(290psi)  

 Operating  Temperature

 -40°C ~ +70°C (-40°F ~ +165°F)   Standard
 077S-002x-1S-H1 +120°C   Optional
 077S-002x-1S-H2 +250°C   Optional
  077S-002x-1S-H3 +320°C   Optional
 +250°C ~ +540°C (+328°F ~ +1000°F)   Optional

 Flow Capacity

 Cv = 0.2 Standard  

 Optional

 Inlet and Outlet Gauge etc..

 Weight

 1.0kg

                                      

    Recommendations


Each product is manufactured into consideration of the best safety and easy manipulation. However in order to use the regulator in most safe, effective, precise and smooth way and prolong its life time, you are recommended to use the actual pressure within the range of 25% ~ 75% of its rated pressure.

 


[ Unit conversion program ]

unit unit conversion
atmosphere atm
bar bar
mbar mbar
kg_f/cm^2 kg_f/cm^2
Pound per Squire Inch PSI (= lb/in^2)
dyne per square centimeter dyne/cm^2
Pascal Pa
Newton per square meter N/m^2
Hecto Pascal hPa
Kilo Pascal kPa
Mega Pascal MPa
수주(水柱)밀리미터 mm H_2O (= mm Aq)
수주(水柱)인치 in H_2O (= in Aq)
수은주(水銀柱)밀리미터 mm Hg (= Torr)
수은주(水銀柱)인치 in Hg