Hansen H5600A, H5600R, H5601, H5602, H5602R Specifications, Applications, Service Instructions & Parts

Pressure-Relief Valve

ONTAC

TPN-SNOITCENNOCDEDAERHT

BOTTOM INLET (DN) SIDE OUTLET (DN)

R0065H

1

/2T (15)PF"

3

/4T (20)PF"

A0065H

1065H

1

/2T (15)PF" PT (25)F"1

2065H

3

/4T (20)PF" PT (25)F"1R2065H

R2365H

3165H

T (25)PF1" 1

1

/4T (32)PF"

1

1

/2T (40)PF"

1

1

/4T (32)PF"

R3365H

4065H

R4365H

Bulletin K109i

AUG 2015

Specifications, Applications,

Service Instructions & Parts

REFRIGERANT

PRESSURE-RELIEF

VALVE

For Ammonia and

Halocarbon Gas Service

Safety Relief to Atmosphere

INTRODUCTION

Designed to provide emergency relief from excessive pressure
in refrigerant-containing vessels, they are built in strict
conformance with ASME Boiler and Pressure Vessel Code
requirements for safety relief devices. Each valve bears the
ASME code symbol of certification (UV ). Their capacities
are rated by the National Board of Boiler and Pressure Vessel
Inspectors. These tamper-resistant valves are accurately set
and sealed by qualified technicians at the factory.

APPLICATIONS

Hansen pressure-relief valves help meet the requirements
of ANSI/ASHRAE 15 Safety Standard for Refrigeration
Systems as well as other worldwide codes. This standard
requires pressure vessels of all refrigeration systems to
be protected by a pressure-relief device or other approved
means to safely relieve pressure in the event of fire or
other abnormal conditions. Once installed, a properly
selected Hansen pressure-relief valve is ready to vent to
atmosphere any temporary excessive overpressure inside
of a vessel. After discharge, these valves will attempt to
reseat to minimize loss of refrigerant. However, once any
relief valve has discharged, it must be replaced as soon
as possible because debris may have settled on the seat
during discharge.

Hansen pressure-relief valves should be connected to the
vapor space of refrigerant vessels, heat exchangers, oil
pots, oil stills, pilot receivers, and elsewhere as may be
required by various codes.

Where dual pressure-relief valves are required, Hansen
offers the three-way valves and other components necessary
for assembly; see page 4. Rupture disc assemblies are
required when using Hansen pressure-relief valves for
halocarbon applications because the high cost of such
refrigerants demands extreme tightness, see bulletin K209.

Also, see Bulletin K129 for information on the EZ-SRV Relief

Valves. These pressure-relief valves offer a cartridge style
design for ease of replacement without disturbing the piping.
EZ-SRV pressure-relief valves are available in pressure
ratings to 600 psi (matching the H5600 “R” series capacities
through 400 psi). Liquid relief valves are also available in
the EZ-SRV series. EZLQ relief valves are designed and
rated for liquid applications.

KEY FEATURES

INSTALLATION
DATE TAG

ACCURATELY
FACTORY SET
AND SEALED

DUCTILE IRON
BODY FOR ADDED
STRENGTH

STAINLESS STEEL
SEATINSERT

ORDERING INFORMATION

Specify catalog number, inlet/outlet connection size, and
pressure setting. For halocarbon applications, a rupture
disc assembly is required. See Rupture Disc Assembly
section of this bulletin. Standard pressure settings: 150*,
175, 200, 225, 250*, 275, 300*, 325, and 350 psig. (*Stock
pressure settings.) Custom pressure settings available;
may require extra delivery time. The H5600 “R” series
valves have reduced capacities, see page 2. CE marked
valves are available, add the letter “E” suffix to catalog
number (example: H5601/250E).

NEOPRENE O-RING
HELPS SEALVALVE
FROM MOISTURE

STAINLESS
STEEL SPRING

STAINLESS STEEL
PISTON

PREMIUM GRADE
VIRGIN TEFLON
SEATDISC

VALVE SIZING AND SELECTION

ONTAC

SNOITCENNOCDEDAERHT

TPN

A

(MM)B(MM)C(MM)

MOTTOB

T (DN)ELNI

EDIS

T (DN)ELTUO

A0065H
R0065H

1

/2T (15)PF"

3

/4T (20)PF"

2.13"
(54)

2.75"
(70)

1.63"
(41)

3.00"
(76)

4.13"
(105)

2.25"
(57)

1065H PT (25)F"1

2065H

R2065H
R2365H

3

/4T (20)PF" PT (25)F"1

1

3165H

R3365H

T (25)PF"1

1

/4T (32)PF"

1

1

/2T (40)PF"

4065H

R4365H

1

1

/4T (32)PF"

Step 1: Use the formula below, per ANSI/ASHRAE 15
Safety Standard for Refrigeration Systems to calculate the
minimum required discharge capacity in pounds of air per
minute. When selecting a dual pressure-relief valve system,
be aware that each individual valve must have sufficient
capacity to protect the vessel.

** This factor is not suitable when combustible materials

are within 20 feet (6.1 m) of the pressure vessel; refer to
relevant codes for corrected sizing method.

Example: To determine the minimum required capacity
of a relief valve for a vessel containing ammonia that
measures 16 feet in length and 6 feet in outside diameter,
the equation would be as follows: 0.5 x 6 x 16 = 48 lb/min.

Step 2: Determine the pressure setting needed. This

C=fDL

C = minimum required discharge capacity of

the relief device in pounds of air per minute.

f = factor for ammonia refrigerant is 0.5**,

factor for R-22 and R-134a refrigerants is 1.6**, for
other refrigerants see ANSI/ASHRAE 15 or contact
factory.

D = outside diameter of vessel in feet.
L = length of vessel in feet.

should be at or below the design pressure of the vessel.
The relief setting should also be at least 25% above the
maximum expected operating pressure to avoid “weeping”
of relief valves. The setting may be below (never above) the
design pressure of the vessel, but it is sometimes best to
match vessel design pressure and relief setting to minimize
the likelihood of a discharge.

Step 3: Refer to the Valve Capacity Ratings below and
select the valve with the required capacity (C) at the desired
pressure setting.

PRESSURE-RELIEF VALVE CAPACITY RATINGS (NATIONAL BOARD CERTIFIED)

ONTAC

R0065H
R2065H

R2365H

R3365H

R4365H

A0065H

1065H
2065H

3165H

4065H

RIA

YTICAPAC

nim/bl 5.01 2.21 8.31 4.51 0.71 6.81 2.02 8.12 5.32 7.62

mfcs 041 261 381 502 622 842 962 092 213 553

nim/bl 22 52 92 23 63 93 24 64 94 65

mfcs 292 733 283 724 274 715 165 606 156 147

nim/bl 82 33 73 14 64 05 45 95 36 27

mfcs 773 534 294 055 806 566 327 187 938 459

nim/bl 43 93 44 94 45 06 56 07 57 58

mfcs 944 815 685 556 427 397 168 039 999 6311

nim/bl 3.13 1.63 9.04 7.54 5.05 3

mfcs 714 084 445 806 276 637 997 368 729 5501

nim/bl 8.53 3.14 8.64 2.25 7.75 2.36 6.86 1.47 6.97

mfcs 674 945 226 596 867 148 319 689 9501

nim/bl 0.35 1.16 2.96 3.77 4.58 5.39 6.101 7.901 8.711 431

mfcs 407 218 029 8201 6311 3421 1531 9541 7651 2871

nim/bl 0.27 0.38 0.49 1.501 1.611 1.721 1.831 1.941 2.061 281

mfcs 859 4011 1521 7931 4451 1961 7381 4891 0312 3242

051 571 002 522 052 572 003 523 053 004

.55 1.06 9.46 7.96 3.97

)gisp(SGNITTESERUSSERPDRADNATS

Important Note: These are atmospheric relief valves. Settings equal pressure above atmosphere when outlet is connected via
proper piping to the atmosphere (outside). (scfm = Standard Cubic Feet per Minute)

INSTALLATION DIMENSIONS

K109i
AUG 2015

H5600 “R” Series capacity valves have green installation
date tags, while all others are blue.

A

B

C

2