Item # D520B-8M, Popoff Valves On Circle Valve Technologies Inc.

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	All Categories 500 Series Relief Valves 0.5 to 150 psig

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All Categories > Relief Valves > 500 Series Relief Valves 0.5 to 150 psig > Item # D520B-8M


	Item # D520B-8M, Popoff Valves
	List Price QUOTE

Circle Seal Pressure Relief Valve 500 Series

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Features

Popoff or inline valves
Adjustable crack pressure
Zero leakage
Optional factory preset
Accurate set pressure
Wide range of cracking pressure
Tamper-proof adjustment
100% seat leakage tested
PED certifications and CE marking available for most models

Note: Proper filtration is recommended to prevent damage to sealing surface.

‘D’ Variation: Prefixed part number is supplied with a cap which diverts high pressure blasts from personnel and instruments, and serves as a rain and dust shield.

Unit of Measure: Imperial Metric Both

Specifications · Leakage · Applications · Safety

Specifications

Series

500

Variation

Popoff with deflector cap

Body Material

Brass

Seal Material¹

Teflon®

Valve Size

1 in

End Connection

Pipe Thread Male

Operating Pressure

0.5 to 150 psig
0 to 10 bar

Cracking Pressure

0.5 to 150 psig

Cracking Pressure Tolerance

±5%

Operating Temperature

-100 to 400 ºF

Proof Pressure

400 psig

Rated Burst Pressure

500 psig

Dim. L

3.16 in

Dim. L1

2.86 in

Hex

1 1/2 in

Dia. D (max.)

1.89 in

Weight

1 lbs

Optional Body Material

303 stainless steel
316 Stainless Steel
Aluminum
Brass

Optional End Connections

M - Male NPT
S - British Taper Pipe (Male)
X - British Taper Pipe (Female)

¹ 520 Series: -100° F to +400° F (-73°C to +204°C) Teflon® o-ring
K520 Series: -320° F to +165° F (-196°C to +74°C) Polished Teflon® o-ring, cryogenic testing and serialization
580 Series: Polished Teflon® o-ring

Leakage

Leakage, Ascending Pressure
Standard seals: 0 to 95% of cracking pressure
Silicon & EPR: 0 to 80% of cracking pressure
Teflon®:
Cracking pressures up to 2.4 psi: 4cc/min at 0 to 50% of cracking pressure Cracking pressures 2.5 psi and higher: 1cc/min at 0 to reseat pressure, 10cc/min from reseat to 90% of cracking pressures

Leakage at Reseat Pressure
All elastomeric seals: Zero
Teflon®: 1cc/min for cracking pressures 2.5 psi and higher

Applications

System overpressure protection
Storage tanks
Freon® recovery systems
Medical equipment
Refrigeration & heating equipment
Measuring & dispensing pumps
Communications equipment
Process control instruments
R&D pilot plants
Vacuum pump safety

Safety

For Your Safety
It is solely the responsibility of the system designer and user to select products suitable for their specific application requirements and to ensure proper installation, operation, and maintenance of these products. Material compatibility, product ratings and application details should be considered in the selection. Improper selection or use of products described herein can cause personal injury or property damage.

MORE IMAGES


	· How it Works

	· Cracking and Reseal Pressure

	· Dimensional Drawing

DOWNLOADS


		500 Series Flow Charts (PDF, 486KB)

		500 Series Dimensions (PDF, 47KB)

Item # D520B-8M, Popoff Valves