© Danfoss | DCS (ms) | 2020.05
AN32022465179401-000201 | 4
ENGLISH
Refrigerants
Applicable to
R717
,
R744
,
HFC
and
HCFC
Temperature range
-50 °C – 100 °C (-58 °F – 212 °F)
Pressure range
The DSV 10 valve is designed for a max. working
pressure of 65 bar (944 psig).
Installation
The DSV change-over valve is installed together
with safety valves (SFA).
This installation guide must be complemented
with the installation guide for the specific safety
valves to secure all details are covered.
IMPORTANT:
THE INLET/OUTLET PIPE DIMENSIONS MUST
NOT BE SMALLER THAN THOSE OF THE
WELDING NIPPLES.
The valve is designed to withstand a high
internal pressure. However, the piping system
should be designed to avoid liquid traps and
reduce the risk of hydraulic pressure caused by
thermal expansion. It must be ensured that the
valve is protected from pressure transients like
“liquid hammer” in the system.
During welding avoid welding debris and dirt in
the threads of the connections and in the
adjacent pipes.
Before assembly clean all parts exposed to
debris and dirt.
DSV 10 G inlet connection (see fig. 1a)
1. Assemble the union nut and welding
nipple and place the assembly further to
the system piping
2. Fully weld the welding nipple to the
system piping and cool down the assembly
3. Place the alu-gasket inside the union nut
and install the DSV 10 by turning the
union nut counter-clockwise
4. Tighten to torque 110 Nm (81 ft lb)
DSV 10 NPT inlet connection (see fig. 1b)
1. Put sufficient teflon tape or similar sealing
material on the DSV 10 inlet
2. Mount the DSV 10 inlet by turning it clockwise
3. Align and tighten by applying a sufficient
torque
Adapter/ blind cap installation (see fig. 2)
1. Place alu-gaskets (G) on the A/B outlets
2. Connect SFA 10 adapters (G) to the outlets A/B.
For pressure testing set-up use blind caps (G)
or plugs (NPT) with sufficient teflon seling to
seal A and B
3. Turn counter-clockwise and tighten
sufficiently. On G-version to torque
110 Nm (81 ft lb)
SFA 10 G (x2) installation (see fig. 3a)
1. Place the alu-gasket inside the union nut,
add G4500 grease (148F3064) to thread a,
and install the SFA by turning the union
nut counter-clockwise
2. Tighten to torque 100 Nm (74 ft lb)
3. Prepare and assemble the outlet
connection as described in the
DSV 10 G inlet connection
section
4. Add G4500 grease (148F3064) to thread b,
and tighten the outlet connection to
torque 100 Nm (74 ft lb)
SFA 10 NPT (x2) installation (see fig. 3b)
1. Put sufficient teflon tape or similar sealing
material on the SFA 10 inlet and outlet
2. Mount the SFA 10 inlet by turning it clockwise
3. Align and tighten by applying a sufficient
torque
4. Connect the SFA 10 outlet to the discharge
piping system
Operating Instructions (see fig. 4)
When the spindle is turned fully clockwise to
mechanical stop, the DSV is opened to outlet B.
When the spindle is turned fully counter-
clockwise to mechanical stop the DSV is opened
to outlet A.
Corrossion protection
The DSV valves are factory painted with a red
oxide primer. The external surface of the valve
housing must be prevented against corrosion
with a suitable protective coating after
installation and assembly.
中文
制冷剂
适用于
R717
、
R744
、
HFC
和
HCFC
温度范围
-50
°
C
–
100
°
C (-58
°
F
–
212
°
F)
压力范围
DSV 10
阀最大设计工作压力为
65 bar (944 psig)
。
安装
DSV
双座阀与安全阀
(SFA)
一起安装。
本安装指南必须与特定安全阀的安装指南相互
补充，以确保涵盖所有细节。
重要提示：
进口
/
出口管道尺寸不得小于焊接转接头的
尺
寸。
该阀门可以承受很高的内部压力。尽管如此，
管路系统的设计也必须避免有存液弯，防止系
统出现因热膨胀导致的过高压力而损坏管路。
必须确保该阀门不受系统中“液锤”等压力动
态的影响。
焊接时，避免焊接碎屑和污物进入接口螺纹及
相邻管道。
安装前，清洁所有存在碎屑和污物的部件。
DSV 10
进口接口（见图
1
）
1.
组装连接螺母和焊接转接头，然后将组件安
装在系统管道上
2.
将焊接转接头完全焊接在系统管道上，等待
组件冷却
3.
将铝垫片放入连接螺母中，顺时针旋转连接
螺母，从而安装
DSV 10
4.
拧至扭矩
110 Nm (81 ft lb)
安装适配接头
/
盲塞（见图
2
）
1.
将铝垫片置于
A/B
出口上
2.
将
SFA 10
适配接头连接至出口
A/B
当系统进行压力测试时，请使用盲塞密封
A
和
B
3.
逆时针方向旋转，并拧至扭矩
110 Nm (81 ft lb)
安装
SFA
（
2
个）（见图
3
）
1.
将铝垫片放入连接螺母中，给螺纹
a
加注
G4500
润滑油
(148F3064)
，逆时针旋转连接
螺母，从而安装
SFA
2.
拧至扭矩
100 Nm (74 ft lb)
。
3.
按照
DSV 10
进口接口
部分所述，准备并组
装出口接口
4.
给螺纹
b
加注
G4500
润滑油
(148F3064)
，将
出口接口拧至扭矩
100 Nm (74 ft lb)
操作说明（见图
4
）
将阀杆顺时针拧到底达到机械停止位置
时，
DSV
向出口
B
开放。将阀杆逆时针拧到底
达到机械停止位置时，
DSV
向出口
A
开放
防腐蚀处理
出厂时
DSV
阀门已用红丹底漆粉刷。安装和
组装后，阀体外表面必须使用适当的保护层
防止腐蚀
