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  • High quality, heavy-duty liquid filled gauge
  • Vacuum and compound ranges through 0 psi to 15,000 psi
  • Die cast Brass case with natural Brass finish
  • Copper alloy or 316 Stainless Steel and Brass wetted parts
  • Cleaning for Oxygen Service (O2) is available only for dry or HL (Halocarbon) filled gauges
  • For gauges with MIP, GY40 fill is standard for liquid filled gauges
Unit of Measure

Specifications

Type

 N/A Pressure Gauge

Cover Ring Material

 N/A Polished Brass

Full Scale Best Fit Straight Line (BFSL) Accuracy (±)

 N/A 1 %

Connection Size

 N/A 1/4 in. NPT die-cast brass with the case. 1/2 in. NPT is available on certain 40-300 ranges as a stock option, and on all other 40-300 and 40-310's as a non-stock option.

Lens/Display Material

 N/A Acrylic with O-Ring Seal

Gauge Size

 N/A 4 in

Connection Location

 N/A Back

Dial

 N/A Aluminum, white background with black scale. UV resistant.

Case Type

 N/A Brass, Back Connection

Pressure Range

 N/A 0 to 300 psi

Scale Option

 N/A psi/kg/cm² Dual Scale

Case Material

 N/A Die Cast Brass (Natural Brass Finish) with Safety Relief Plug

Measuring Element

 N/A Copper Alloy "C" Tube

Series

 N/A 300

Pointer

 N/A Balanced Aluminum, Black Finish

Movement

 N/A Brass and Nickel-Silver with Highly Polished Bearing Surfaces

Fill Liquid

 N/A Glycerin

Warranty

 N/A 3 yr

Related Items

 N/A , 1/4" National Pipe Thread (NPT), Male x Female, Steel, Hard Seat, 0.187" Orifice Needle Valve
, 1/4" National Pipe Thread (NPT), Male x Female, Steel, Hard Seat, 0.187" Orifice Block and Bleed Valve
, 1/4" National Pipe Thread (NPT), Male x Female, 316 Stainless Steel, Hard Seat, 0.187" Orifice Block and Bleed Valve
, 1/4" National Pipe Thread (NPT), Male x Female, Steel, Soft Seat, 0.187" Orifice Block and Bleed Valve

Temperature Ranges

Media Temperature Range1 N/A -4 to 140 ºF-20 to 60 ºC
Ambient Temperature Range2 N/A 0 to 160 ºF-18 to 71 ºC

Optional Temperature Range

 N/A -40 to 212 ºF-40 to 100 ºC

Application

Application

 N/A
  • Automotive
  • Construction
  • Hydraulics & pneumatics
  • Mining
  • Stamping & forming presses
  • Transportation

Prop 65 Warnings

Prop 65 Warnings

 N/A
WARNING: This product can expose you to chemicals including Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

Working Pressure Limitations

Working Pressure Limitations

 N/A Dynamic Pressure
The working pressure should be limited to 60% of the dial range

Static Pressure
The working pressure, where no sharp fluctuations occur, should be limited to 90% of the dial range

Limitations Which Apply Are

Limitations Which Apply Are

 N/A
  • Bourdon tube pressure gauges must be used within their calibrated maximum range to prevent damage
  • The pressure gauges must be operated within the following working pressure limits:
    • Dynamic Pressure application, 60% of the dial range
    • Static Pressure applications, where no sharp fluctuations occur, 90% of the dial range
  • The gauges must be operated within specified ambient temperature ranges
  • Determination of gauge failures will be made by NOSHOK, Inc., which will use its equipment and personnel or a certified test facility specializing in this type of evaluation and determination. Gauge failures determined to be caused by over-range, incompatibility with environment or product media and abuse will not be considered under this warranty. NOSHOK, Inc. will, at its discretion, repair or replace the working parts of the damaged gauge without cost to the customer. This written warranty applies only to the NOSHOK gauges referenced in the first paragraph of this warranty, sold by NOSHOK, Inc. and its authorized distributors.

Caution

Caution

 N/A Operating conditions including, but not limited to, system pressure, media compatibility and ambient conditions must be considered when selecting gauges and accessories. Improper selections and use of gauges could possibly cause gauge failure and lead to possible property damage or personal injury. Refer to the American National Standard ANSI B40.1 for the correct selection and use of gauges. A copy of this standard may be obtained from the American Society of Mechanical Engineers, United Engineering Center, 345 East 47th Street, New York, NY 10017.

In keeping with and for purposes of product and/or manufacturing process improvements, NOSHOK, Inc. reserves the right to make design changes without prior notice.

Options and Accessories

Installed Options and Accessories

 N/A Available
  • Maximum Indicating Pointer (MIP)
  • Glass Lens Overlay (GLO)
  • Safety Glass Overlay (SGO)
  • Chrome Front Flange (CFF)
  • Chrome Front Flange w/o Holes (CFFN)
  • Brass Front Flange (BFF)
  • Rear Flange (RF)
  • Chrome Cover Ring (CCR)
  • Increased Accuracy from 1.5% to 1.0% (IA)
  • SAE J1926-3:7/16-20 Adjustable Connection (SST) Includes FKM O-ring. Consult factory for availability.
  • 10-32-UNF-2B (10-32)
  • Orifice - Brass Threaded 0.3mm (BT3)
  • Orifice - Brass Threaded 0.4mm (BT4)
  • Orifice - Brass Threaded 0.8mm (BT8) - Standard
  • Rubber Case Protectors (RCP)
  • Laser Marking (LM)
  • Stainless Steel Tagging (ST)
Gauge Fill Options
  • Silicone (SL)
  • Halocarbon (HL)
  • -40 Degree Service (GY40)
  • Mineral Oil (MO)
Certificates
  • Certified Calibration (CC)
  • Cleaning for Oxygen Service (O2), Up to 1000 psi
  • Cleaning for Oxygen Service (O2), 1500 psi and up

Uninstalled Options and Accessories

 N/A
  • Chrome Adaptor Ring (25-13-1-CHROME-AR)
  • Rubber Case Protector (25-123459-0-RCP)
  • Certificate of Cleaning (COCL)
  • Certificate of Conformance (COC)

Assembly Options

 N/A NOSHOK offers multiple assembly options to meet your specific system requirements. Consult factory to discuss your customized solution.

Diaphragm Seals

 N/A NOSHOK offers a wide variety of standard & elevated pressure, and reduced pressure replaceable and non-replaceable diaphragm seals, designed to isolate and/or protect the pressure measuring instrument from corrosive, viscous, contaminated or very high temperature process media.

Distribution Manifolds

 N/A NOSHOK's Distribution Manifolds connect multiple instruments to one diaphragm seal, eliminating multiple connections that lead to possible leak paths.

Metric Dials and Customized Special Dials

 N/A
  • Dual scale metric dials in psi/bar, psi/kPa and psi/kg/cm2
  • Other scales are available for specific sizes and ranges, such as single scale bar and kPa, refrigerant scales and altitude scales
  • Customized special dials such as non-standard metric scale, tons of ram, lbs. of force, etc. are available in small quantities (as few as one piece) on some NOSHOK gauges
Please consult the factory for availability.

Pressure Snubbers - Piston Type

 N/A
  • Resist clogging and are self-cleaning
  • Five different sized pistons included with each snubber to ensure the correct amount of snubbing for virtually every application
  • Available in Brass and 316 Stainless Steel in 1/4" NPT, 1/2" NPT or SAE J1926-3: 7/16-20
  • Weight approximately 0.2 lb. for 1/4" & 7/16", and approximately 0.4 lb. for 1/2"​​​​​​

Pressure Snubbers - Sintered Type

 N/A
  • Cost effective solution to protect expensive instrumentation
  • Increases gauge readability by smoothing out pressure surges, pulsations and spikes
  • 5 basic elements available for each snubber to accommodate specific application needs
  • Snubbing action achieved by utilizing a corrosion resistant 316 Stainless Steel sintered porous element
  • Exotic materials or intermediate disc grades available
  • Provides long service life with no moving parts to wear out
  • Weight approximately 0.2 lb. for 1/4" & 7/16", and approximately 0.4 lb. for 1/2

Refrigeration Gauges with Dials Reading in Pressure and Temperature

 N/A Refrigeration gauges with dials reading in pressure and temperature are available in NOSHOK 300, 400 and 500 Series Pressure Gauges for R-12 and R-22

Steam Syphons

 N/A
  • Protect the instrument from the damaging effects of high temperature steam
  • Recommended for use in all steam applications
  • Available in 1/4" and 1/2" NPT sizes in welded steel, welded 316 Stainless Steel or seamless 316 Stainless Steel with ratings to 3800 psi at 850 ºF

Swivel Adapters

 N/A
  • Temperature ratings: 15,000 psi at 200 ºF and 3000 psi at 1000 ºF
  • Used with gauges and gauge valves to adjust the line of sight
  • Rotates 360º to allow the connected instrument to be positioned in the desired direction
  • The pressure connection is achieved with a tapered cone style compression fitting simply by tightening the swivel hex nut
  • All 316 Stainless Steel construction
  • Standard with 1/2" NPT male process - 1/2" NPT female instrument connections
  • Also available with 1/4" NPT connections, same specifications apply
  • Weight approximately 0.8 lb.

Warnings

Warnings

 N/A Glycerin or silicone could result in a spontaneous chemical reaction or explosion when combined with strong oxidizing agents including, but not limited to, chlorine, oxygen, hydrochloric or nitric acid, and hydrogen peroxide. Do not use glycerin or silicone filled gauges or accessories in these types of service. Consult factory for application assistance.

This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.

Note

Note

 N/A Please consult your local NOSHOK Distributor or NOSHOK, Inc. for availability and delivery information.
  • 1 For every 18 ºF (10 ºC) shift in temperature from which the gauge is calibrated, the user can experience up to ±0.4% additional error.
  • 2 For every 18 ºF (10 ºC) shift in temperature from which the gauge is calibrated, the user can experience up to ±0.4% additional error.