Model designation and documentation

Technical documents for further information:

DB-262: Operating instructions Direct expansion evaporators (DH)
DP-273: Brochure Dry-expansion evaporators (DH)
AT-660: Application of R290 and R1270, A3 refrigerants

The name plate will only contain the following elements.

Example: DH2-323PSH-4P-LT-CE

The 3D model will usually contain the whole designation as follows.

Example: DH2-323PSH-4P-LT-R-FL-STW-IS-TH-CE

Nomenclature as follows:

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Series code

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Number of independent refrigerating circuits:
1, 2, 3 or 4

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Nominal shell tube size from 14 to 50
(14 = 141 mm, 50 = 508 mm)

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Model identification number

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Refrigerant variant:
no letter = for HFC and HFO refrigerants
P = for hydrocarbon refrigerants

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Variant code:
no letter = standard
S = customised version

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Baffles variant:
no letter = standard
H = short distance
X = shorter distance

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Number of water side passes:
2P = 2 passes
4P = 4 passes

DH 2 - 32 3 P S H - 4P - HP / LT / TBONLY - R - FL - STW - IS - TH - CE

Design pressure:
no letter = standard
HP = for high pressure (45 bar on tube side, 16 bar on shell side)

Design temperature:
no letter = standard
LT = for low temperature (-40 °C)

Design variant:
no letter = standard
TBONLY = tube bundle only

Combinations are possible, i.e. indicators for design pressure, design temperature and design variant can appear simultaneously in the model designation.

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Orientation of the water connections:
no letter = top
R = right
L = left

DH 2 - 32 3 P S H - 4P - LT - R - STS / FL - STW - IS - TH - CE

Special material variant:
no letter = standard
STS = all stainless steel
SHSTS = shell stainless steel
BFSTS = baffles stainless steel
TBSTS = tube bundle stainless steel
TBC = carbon steel tubes
CUNI = copper-nickel tubes
TB0,45/0,7 = tubes special thickness

Water connections:
no letter = standard (threaded 14-16 / flexible couplings)
FL = flange adapter (VIC flanges)
FLW = welded flanges

Combinations are possible, i.e. indicators for special material variant and water connections can appear simultaneously in the model designation.

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Supports:
no letter = without supports
STW = welded supports
STK = loose supports

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Thermal insulation:
no letter = without thermal insulation
IS = thermal insulation 19 mm

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Heating system (available only with thermal insulation IS):
no letter = without heating system
TH = tape heater

DH 2 - 32 3 P S H - 4P - LT - R - FL - STW - IS - TH - CE

Approval:
CE = EU Pressure Equipment Directive 2014/68/EU

Available on request:
DNV = Det Norske Veritas
LR = Lloyd's Register
BV = Bureau Veritas
RINA = Registro Italiano Navale
SELO/CML = China Manufacturing License
NR13 = Brasilian Standard
ABS = American Bureau Shipping
AS 1210 = Australian Standard Pressure Vessels