Danfoss PVG-EX Proportional Valve Group

Installation Guide

Product Overview

The Danfoss PVG-EX program is an explosion-proof PVG designed for hazardous areas such as mining and the oil and gas industries. It is developed in compliance with EU Directive 2014/34/EU (ATEX) and relevant EN standards.

Safety Warnings

All directional control or proportional valves can fail and cause serious damage. Machine builders and system integrators are solely responsible for product selection and ensuring all performance, safety, and warning requirements are met. Compliance with Machinery Directive 2006-42-EC and EN 13849 is governed by the process of choosing the control system and safety levels.
All national safety regulations must be fulfilled during installation, start-up, and operation. Disregarding these regulations poses a risk of serious personal injury or material damage.
Work on the valve group must only be performed by qualified professionals.
PVG units with non-conductive coating require preventive protection against electrostatic charge via an earthed metal connection.

Nameplate Key

The nameplate provides essential information about the PVG-EX unit:

Number	Description
1	PVG Valve Group code number
2	Code number, production date, and serial number (e.g., 42 12 C xxxxxxx: Week 42, Year 2012, Day C=Wednesday, Serial number)
3	CE Conformity marking
4	EU marking (per 80079) - Standard part
5	Ambient temperature range
6	EU marking (per 2014/34/EU) - Directive part

T-category with ambient temperature at 65°C [149°F]:

Oil inlet temperature	T-category
≤ 79°C [174°F]	T5
79-90°C [174-194°F]	T4

Ex Marking Information

Ex marking (EN 80079-36 standard part)

Description	EU Marking
Protection principle	h
Explosion protection marking
Equipment group	I / II
Equipment protection level (EPL)	Mb / Gb
T-class	T5...T4

Ex marking (EU Directive part)

Description	EU Marking
CE conformity marking	CE
Explosion protection marking
Equipment Group	I / II
Equipment Category	M2 / 2G

EPL/Equipment category

Definition	Level of protection	Typical zone of application	IEC	EU
			EPL	Group
Mines	Very high	N/A	Ma	I
	High		Mb
Gas atmosphere	Very high	0	Ga	II
	High	1	Gb
	Enhanced	2	Gc

Technical Data

Parameter	Description	Value
Maximum rated pressure	P-port continuous	350 bar [5075 psi]
Maximum rated pressure	P-port intermittent	400 bar [5800 psi]
	T-port static/dynamic	25/40 bar [365/580 psi]
	A/B-port continuous	350 bar [5075 psi]
	A/B-port intermittent	420 bar [5800 psi]
Maximum rated flow	P-port	140 l/min [37 US gal/min]
Maximum rated flow	Port A/B	125 l/min [33 US gal/min]
Oil temperature	Recommended	30 to 60°C [86 to 140°F]
	Minimum	-30°C [-22°F]
	Maximum	90°C [194°F]
Ambient temperature	Recommended	-30 to 60°C [-22 to 140°F]
Ambient temperature
Oil viscosity	Operating range	12 to 75 cSt [65 to 347 SUS]
	Minimum	4 cSt [39 SUS]
	Maximum	460 cSt [2128 SUS]
Oil cleanliness	Minimum	23/19/16 (according to ISO 4406)

Standard hydraulic oil has a flash point (COC) ignition temperature of 230°C [446°F] and auto ignition temperature 343°C [649°F]. Hydraulic fluid used must fulfill requirements for Auto Ignition temperature for the designated area.

Recommended Hydraulic Fluids:

ISO VG 68
ISO VG 46
ISO VG 32
DIN 51524-2: Mineral oil hydraulic fluids of category HLP
DIN 51524-3: Mineral oil hydraulic fluids of category HVLP
ISO 11158: Mineral oil hydraulic fluids of category HM
ISO 11158: Mineral oil hydraulic fluids of category HV

Identification

The diagram shows the identification of various ports and modules on the PVG unit:

PVP: Pressure setting
PVB: Basic module
PVLP/PVLA
PVB
PVBZ
PVS
PVP
PVM
D: Engraved part number on PVP and PVB
C: PVG number, week and year of installation, series number and PVP-pressure setting

Installation and Plug Orientation

The table provides dimensions for different PVB configurations:

PVB	1	2	3	4	5	6	7	8	9	10
L (mm)	82	130	178	226	274	322	370	418	466	514
L (in)	3.23	5.12	7.01	8.90	10.79	12.68	14.57	16.46	18.35	20.24

Ensure sufficient space for dismantling and free movement of the PVM lever with a plastic knob.

Connection Details

Connection Threads Type G (ISO 228-1) - Max. tightening torques:

Connection	P	A/B	T	LS, M, LSA, LSB, PVH, Accu	LX, PVS, PVSI
Sealing Thread	G 1/2	G 3/4	G 1/2	G 3/4	G 1/4	G 1/8	G 1/4
With steel washer	130 N·m [1150 lbf·in]	210 N·m [1850 lbf·in]	130 N·m [1150 lbf·in]	210 N·m [1850 lbf·in]	40 N·m [350 lbf·in]	17 N·m [150 lbf·in]	40 N·m [350 lbf·in]
With copper washer	30 N·m [270 lbf·in]	50 N·m [445 lbf·in]	30 N·m [270 lbf·in]	50 N·m [445 lbf·in]	20 N·m [180 lbf·in]	15 N·m [135 lbf·in]	20 N·m [180 lbf·in]
With aluminum washer	70 N·m [620 lbf·in]	110 N·m [970 lbf·in]	70 N·m [620 lbf·in]	110 N·m [970 lbf·in]	30 N·m [270 lbf·in]	15 N·m [135 lbf·in]	30 N·m [270 lbf·in]
With cutting edge	130 N·m [1150 lbf·in]	210 N·m [1850 lbf·in]	130 N·m [1150 lbf·in]	210 N·m [1850 lbf·in]	40 N·m [350 lbf·in]	17 N·m [150 lbf·in]	40 N·m [350 lbf·in]

UN and UNF connection threads - O-ring boss port - Max. tightening torques:

Connection	P	A/B	T	LS, M, LSA, LSB, PVH, Accu	LX, PVS, PVSI
Screwed connection UNF	7/8 in -14	11/16 in -12	7/8 in -14	11/16 in -12	1/2 in -20	3/8 in -24	1/2 in -20
O-ring	90 N·m [800 lbf·in]	120 N·m [1060 lbf·in]	90 N·m [800 lbf·in]	120 N·m [1060 lbf·in]	30 N·m [270 lbf·in]	10 N·m [90 lbf·in]	30 N·m [270 lbf·in]

Assembly Diagrams

The document includes diagrams illustrating standard and optional assembly procedures for the PVG-EX system, showing the connections between modules like PVE-EX, PVB, PVP, and PVM.

Bleeding Procedure

If the valve group is installed vertically, bleeding at the adjusting screws is recommended. Bleeding of the PVEA may be necessary due to hydraulic build-up.

Pressure Setting

Instructions and diagrams are provided for pressure setting of PVP, LS_A, and LS_B components.

PVM - Lever Installation

The lever should be screwed completely home. The PVG must be used only with the Danfoss certified manual lever with a plastic knob. Ensure sufficient space for free movement of the lever to prevent impact with solid objects.

PVE - Installation

For installation, mounting, and technical data of the PVE-EX, refer to the specific PVE-EX Installation Guides:

AN212686484914 for eb mb version
AN216686485434 for db version
AN249186480855 for UL version

EU Declaration of Conformity

Danfoss A/S declares that the PVG Load Independent Proportional Valve, including PVG32-EX, PVG128-EX, PVG256-EX and associated PVE-EX modules, conform to relevant EU directives and standards when used according to instructions. The document lists specific variants and their compliance markings.

The declaration is provided in English, with a note that translations are the responsibility of the translator.

EU Acknowledgement of Receipt

This section confirms that the Technical File for the PVG Load Independent Proportional Valve has been received and stored according to conformity assessment procedures by the relevant authorities.

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