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51 Series | FST High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)

51 Series | FST High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)
51 Series | FST High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)51 Series | FST High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)51 Series | FST High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)51 Series | FST High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)51 Series | FST High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)
CategoriesSpecialty Couplers
InterchangeHANSEN ST SERIES
InterchangePARKER SST SERIES
InterchangePARKER BST SERIES
InterchangeDIXON E SERIES
InterchangeFOSTER FST SERIES
Update TimeSep 12,2025
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Detail Information
Items
Specs
Applications

51 Series 

High Flow, Unvalved, Hydraulic Quick Couplings (Brass, Steel, Stainless Steel)

This EH series is interchangeable with HANSEN ST SERIES, PARKER SST SERIES, PARKER BST SERIES, DIXON E SERIES, and FOSTER FST SERIES. This series is all unvalved (no internal valve), and it is used in applications where maximum flow is required. Ideal for high-pressure water and steam washers, carpet cleaners, and mold coolant lines applications.

Female


Brass (Material), Other Threads/Fitting Ends Are Available Upon Request
Art. No.
Body Size (inch)
Ls(mm)
D(mm)
Hs(mm)
A(mm)
T
PFBFC5114-1/4"
1/4''
37.5
25
S22.3
12
1/4"NPT
PFBFC5138-3/8"
3/8''
39.5
28.5
S25.4
14
3/8"NPT
PFBFC5112-1/2"
1/2''
54.1
34.5
S30.2
16
1/2"NPT
PFBFC5134-3/4"
3/4''
62.7
42.4
S38.1
20
3/4"NPT
PFBFC5110-1"
1''
68.6
52.3
S47.6
25.5
1"NPT
PFBMC5114-1/4"
1/4''
43
25
S22.3
12
1/4"NPT
PFBMC5138-3/8"
3/8''
45
28.5
S25.4
14
3/8"NPT
PFBMC5112-1/2"
1/2''
54.1
34.5
S30.2
16
1/2"NPT
PFBMC5134-3/4"
3/4''
62.7
42.4
S38.1
20
3/4"NPT
PFBMC5110-1"
1''
68.6
52.3
S47.6
25.5
1"NPT
Stainless 316 (Material), Other Threads/Fitting Ends Are Available Upon Request
Art. No.
Body Size (inch)
Ls(mm)
D(mm)
Hs(mm)
A(mm)
T
PFSSFC5114-1/4"
1/4''
37.5
25
S22.3
12
1/4"NPT
PFSSFC5138-3/8"
3/8''
39.5
28.5
S25.4
14
3/8"NPT
PFSSFC5112-1/2"
1/2''
54.1
34.5
S30.2
16
1/2"NPT
PFSSFC5134-3/4"
3/4''
62.7
42.4
S38.1
20
3/4"NPT
PFSSFC5110-1"
1''
68.6
52.3
S47.6
25.5
1"NPT
PFSSMC5114-1/4"
1/4''
43
25
S22.3
12
1/4"NPT
PFSSMC5138-3/8"
3/8''
45
28.5
S25.4
14
3/8"NPT
PFSSMC5112-1/2"
1/2''
54.1
34.5
S30.2
16
1/2"NPT
PFSSMC5134-3/4"
3/4''
62.7
42.4
S38.1
20
3/4"NPT
PFSSMC5110-1"
1''
68.6
52.3
S47.6
25.5
1"NPT

Male

High Flow, Unvalved, Hydraulic Quick Couplings
Brass (Material), Other Threads/Fitting Ends Are Available Upon Request
Art. No.
Body Size (inch)
Lp(mm)
C(mm)
Hp(mm)
A(mm)
T
PFBFP5114-1/4"
1/4''
37
19.5
S19
12
1/4"NPT
PFBFP5138-3/8"
3/8''
40.5
22.5
S22.5
14
3/8"NPT
PFBFP5112-1/2"
1/2''
50.5
33.3
S30.2
16
1/2"NPT
PFBFP5134-3/4"
3/4''
58.7
41.9
S38.1
20
3/4"NPT
PFBFP5110-1"
1''
66
52.3
S47.6
25.5
1"NPT
PFBMP5114-1/4"
1/4''
43
19.5
S19
12
1/4"NPT
PFBMP5138-3/8"
3/8''
46.5
22.5
S22.5
14
3/8"NPT
PFBMP5112-1/2"
1/2''
50.5
33.3
S30.2
16
1/2"NPT
PFBMP5134-3/4"
3/4''
58.7
41.9
S38.1
20
3/4"NPT
PFBMP5110-1"
1''
66
52.3
S47.6
25.5
1"NPT
Steel (Material), Other Threads/Fitting Ends Are Available Upon Request
Art. No.
Body Size (inch)
Lp(mm)
C(mm)
Hp(mm)
A(mm)
T
PFSFP5114-1/4"
1/4''
37
19.5
S19
12
1/4"NPT
PFSFP5138-3/8"
3/8''
40.5
22.5
S22.5
14
3/8"NPT
PFSFP5112-1/2"
1/2''
50.5
33.3
S30.2
16
1/2"NPT
PFSFP5134-3/4"
3/4''
58.7
41.9
S38.1
20
3/4"NPT
PFSFP5110-1"
1''
66
52.3
S47.6
25.5
1"NPT
PFSMP5114-1/4"
1/4''
43
19.5
S19
12
1/4"NPT
PFSMP5138-3/8"
3/8''
46.5
22.5
S22.5
14
3/8"NPT
PFSMP5112-1/2"
1/2''
50.5
33.3
S30.2
16
1/2"NPT
PFSMP5134-3/4"
3/4''
58.7
41.9
S38.1
20
3/4"NPT
PFSMP5110-1"
1''
66
52.3
S47.6
25.5
1"NPT
Stainless 316 (Material), Other Threads/Fitting Ends Are Available Upon Request
Art. No.
Body Size (inch)
Lp(mm)
C(mm)
Hp(mm)
A(mm)
T
PFSSFP5114-1/4"
1/4''
37
19.5
S19
12
1/4"NPT
PFSSFP5138-3/8"
3/8''
40.5
22.5
S22.5
14
3/8"NPT
PFSSFP5112-1/2"
1/2''
50.5
33.3
S30.2
16
1/2"NPT
PFSSFP5134-3/4"
3/4''
58.7
41.9
S38.1
20
3/4"NPT
PFSSFP5110-1"
1''
66
52.3
S47.6
25.5
1"NPT
PFSSMP5114-1/4"
1/4''
43
19.5
S19
12
1/4"NPT
PFSSMP5138-3/8"
3/8''
46.5
22.5
S22.5
14
3/8"NPT
PFSSMP5112-1/2"
1/2''
50.5
33.3
S30.2
16
1/2"NPT
PFSSMP5134-3/4"
3/4''
58.7
41.9
S38.1
20
3/4"NPT
PFSSMP5110-1"
1''
66
52.3
S47.6
25.5
1"NPT

Accessories


Technical Specifications

Dash Size
Body Size (Inch)
Max. Work PressureBrass Coupler+Steel Plug(bar)
Max. Work Pressure Brass Coupler +BrassPlug (bar)
Max. Work Pressure Brass Coupler +StainlessPlug (bar)
Max. Work Pressure StainlessCoupler +StainlessPlug (bar)
Min. Burst
Pressure
Brass 
Coupler
+Steel 
Plug
(bar)
Min. Burst Pressure Brass Coupler +BrassPlug (bar)
Min. Burst Pressure Brass Coupler +StainlessPlug (bar)
Min. Burst Pressure StainlessCoupler +StainlessPlug (bar)
04
1/4''
379
262
379
517
1517
1055
1621
2331
06
3/8''
310
207
310
517
1262
972
1462
2372
08
1/2''
241
166
241
241
960
669
966
966
12
3/4''
207
138
172
207
870
600
862
1338
16
1''
172
110
138
138
697
462
607
628
Material:
Carbon Steel, Stainless 316, Brass
Seals:
NBR, Seals can be customized to meet your special work condition/media
Working Temperatures:
-25 °C to 125 °C, Customizable
Surface Treatment:
/
Specifications:
Series Interchange:
HANSEN ST SERIES, PARKER SST SERIES, PARKER BST SERIES, 
DIXON E SERIES, FOSTER FST SERIES
Valve Type:
 None
Connection:
Sleeve Retraction
Disconnection:
Sleeve Retraction
Connection Under Pressure:
Not Allowed

Pressure Drop

Pressure Drop

Applications

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NINGBO E.H HYDRAULIC CO., LTD.
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NINGBO E.H HYDRAULIC CO., LTD.
Tel:

+0086-574-27882700

Email:
WhatsApp:
8613967841269
Address:
No.7 Longteng Road, Maoshan Industrial Area, Jiangshan, Yinzhou District, Ningbo, China, 315193

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