Manufacturer of Temperature and Pressure Instruments and Controls Since 1882

905 Waverly Avenue, Holtsville, NY, 11742

631.207.1200

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TABLE 1 - PRESSURE SNUBBERS

STYLE CODE HOUSING MATERIAL
Code
HOUSING
MATERIAL
NPT
CODE
NPT PSI RATING
AT 70°F
PSN B Brass 25 1/4" 1,500 psi
S 303 S.S. 50 1/2" 1,500 psi

TABLE 2

PORSITY
SYMBOL
CODE
TYPE OF
SERVICE
PORE
OPENING
MEAN
PORE
OPENING
MAX
E Water and Light Oil (30 to 225 SSU*) .0013 .0025
D Oil (225 to 500 SSU) .0025 .005
G Air and other Gases .0004 .0009

*SSU - Saybolt Seconds Universal Viscosity

 

For complete Catalog No. use Coding from Table 1 & 2 EX: PSN-B-25-E=Brass Housing 1/4" NPT, E Porosity Disc.

 

 

 

NEEDLE VALVE

CAT. NO. SIZE MATERIAL RATING
25NVBR 1/4" FNPT x 1/4" FNPT Brass 600 psi & 300°F
25NVSS 1/4" FNPT x 1/4" FNPT 304S.S. 4000 psi & 150°F
50NVBR 1/2" FNPT X 1/2" FNPT Brass 600 psi & 300°F
50NVSS 1/2" FNPT X 1/2" FNPT 304S.S. 4000 psi & 150°F

SYPHONS

CAT. NO. SIZE MATERIAL RATING
SY-14S 1/4" NPTM x 1/4" NPTM Iron 300 psi & 300°F
SY-14B 1/4" NPTM x 1/4" NPTM Brass 400 psi & 300°F
SY-14SS304 1/4" NPTM x 1/4" NPTM 304S.S. 430 psi & 800°F
SY-14SS316 1/4" NPTM x 1/4" NPTM 316S.S. 450 psi & 800°F
ASY-12S 1/2" NPTM x 1/2" NPTM Iron (Angle) 300 psi & 300°F
ASY-12B 1/2" NPTM x 1/2" NPTM Brass (Angle) 400 psi & 300°F

NOTE: All Syphons Schedule 40. Schedule 80 available on request.

 

 

 BRASS GAUGE COCKS

CAT. NO. SIZE MATERIAL RATING
TC-14 1/4" NPTM x 1/4" NPTM Brass 300 psi & 300°F
MTC-14 1/4" NPTM x 1/4" NPTM Brass 400 psi & 300°F
LC-14 1/4" NPTM x 1/4" NPTM Brass 430 psi & 800°F
TC-12 1/2" NPTM x 1/2" NPTM Brass 450 psi & 800°F

We have recently changed our offering in gauge cocks. The traditional "Conbraco" style is

now our "Economical" standard. Please note that these are the "Nut Bottom" design, rating guaranteed.

 

The former forged yellow handle type is still available with the new Catalog Number BTC-14.

FORGED BRASS GAUGE COCKS

CAT. NO. SIZE MATERIAL RATING
BTC-14 1/4" NPTM x 1/4" NPTM Brass 200 psi. Hydraulic

CHROME PLATED BRASS BALL VALVES

CAT. NO. SIZE MATERIAL RATING
BV25 1/4" NPTM x 1/4" NPTM Chrome Plated Brass 450 psi & 250°F
MBV25 1/4" NPTM x 1/4" NPTM Chrome Plated Brass 450 psi & 250°F
BV50 1/2" NPTF x 1/2" NPTF Chrome Plated Brass 450 psi & 250°F

PRESSURE TEST PLUGS

 

Weiss Temperature/Pressure Plugs allows for quick, efficient and accurate testing of

hydronic pipe lines throughout HVAC systems. Offered in both nordel (blue cap) for

hot and chilled water and neoprene (red cap) for natural gas. Weiss plugs are consistently rated at 1000 psi. The self-sealing core insures long life and continuous service.

CAT. NO. DESCRIPTION BODY & CAP
BP25-NR 1/4" NPT Nordel Brass
BP25-NP 1/4" NPT Neoprene Brass
BP50-NR 1/2" NPT Nordel Brass
BP50-NP 1/2" NPT Neoprene Brass
BP25L-NR 1/4" NPT Nordel w/ 1-3/4" Lag Brass
BP25L-NP 1/4" NPT Neoprene w/ 1-3/4" Lag Brass
CAT. NO. ACCESSORIES
TPK Test Kit
GA18 Gauge Adapter
PT220 1" Dial Pocket Test 0/220°F
PT125 1" Dial Pocket Test 0/125°F
TL25-030-4L 2 1/2" Gauge 0-30 psi
TL25-160-4L 2 1/2" Gauge 0-160 psi

THERMAL ISOLATOR

 

Coiled Tubing Assembly designed to protect Pressure Instruments from high medium temperature that might damage the instrument or affect its rated accuracy. Capable of reducing process temperature up to 305°F (170°C).

 

 

* Male instrument connection is standard, since the use of a Weiss 25NVSS Needle Valve is recommended between the gauge and isolator.

 

 

 

 

CAT. NO. DESCRIPTION
TI25M 1/4" NPT Male Instrument Connection*
1/4" NPT Male Process Connection
TI25F 1/4" NPT Male Instrument Connection*
1/4" NPT Female Process Connection

© 2018 Weiss Instruments LLC, 905 Waverly Avenue, Holtsville, NY 11742 • 631.207.1200

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