YOUR SINGLE SOURCE FOR REPAIR KITS
To support your aftermarket efforts, Royal United manufactures and stocks diaphragm repair kits to fit all standard pulse valve designs of the leading valve suppliers present in the US market.
Each Kit is Private Labeled
Making sure you keep your aftermarket business is our utmost priority! Every time you order a diaphragm kit from Royal United, it will be labeled with your logo, your contact information, and your unique part number. When it’s time to order more– your customer will have only your information on hand! Contact us for a customized sample today.- We don’t make their kits; we make our kits to fit their valve
Our diaphragm rebuild kits are equivalent to factory originals – don’t believe us, check out our 3rd party testing to ONE MILLION pulses. All standard models and sizes are in stock.We offer replacements for the following: Turbo, Asco®, Goyen®, Mecair®, and Tae-Ha®.
- All diaphragms are made from high quality Neoprene or Buna-N Nitrile for maximum life and performance
- Contact Sales for our great everyday OEM pricing.

PRODUCT DETAILS
If you don’t see your valve or kit # please call your Sales Representative
All Neoprene and Buna-N Diaphragms are good for -4°F to 176°F
All Viton Diaphragms are good for -4°F to 392°F
Low Temp options available; please contact your Sales Representative.
PART # | SIZE | BOLT CONFIGURATION | MATERIAL | VALVES USED IN | COMMON KIT REPLACEMENTS | # OF SPRINGS |
---|---|---|---|---|---|---|
A-20 | ¾” | 5 | BUNA-N | 8353C33
8353C30 8353C4 8353C3 |
K96875
K228864 |
1 |
A-25 | 1” | 4 | BUNA-N | 8353C35
835355 835356 8353G41 8353G52 8353G53 |
K200262
K238866 K314450 K316563 |
0 |
A-V25 | 1” | 4 | VITON | 8353G41V | K314451 | 1 |
A-40 | 1 ½” | 2 SMALL 6 LARGE | BUNA-N | 8353F38 | K222641 | 1 |
A-40AH | 1 ½” | 4 SMALL 6 LARGE | BUNA-N | 8353G54
8353H39 8353J39 8353H54 |
K316609
K322108 |
1 |
A-402S | 1 ½” | 4 SMALL 6 LARGE | BUNA-N | 835357
8353H38 8353A57 |
K238870
K262964 K276886 |
2 |
A-V402S | 1 ½” | 4 SMALL 6 LARGE | VITON | 835357
8353H38 8353A57 |
K276887 | 2 |
PART # | SIZE | BOLT CONFIGURATION | MATERIAL | VALVES USED IN | COMMON KIT REPLACEMENT | # OF SPRINGS |
---|---|---|---|---|---|---|
G-20 | ¾” | 5 | BUNA-N | CA20T
RCA20T CA20DD RCA20DD CA20FS RCA20FS |
K2000
K2002 K2011 |
1 |
G-20M | ¾” | 5 | BUNA-N | CA20M
RCA20M |
K2003 | 1 |
G-25 | 1” | 4 | BUNA-N | CA25T
RCA25T CA25DD RCA25DD CA25FS RCA25FS CA25MM RCA25MM |
K2501
K2511 K2512 K2518 |
1 |
G-25HS | 1” | 4 | BUNA-N | CA32T
RCA32T |
K2500 | 1 |
G-SW25 | 1” | 4 | BUNA-N | RCAC25T4
RCAC25DD4 RCAC25FS4 |
K2546 | 0 |
G-35 | 1 ½” | 6 | BUNA-N | CA35T
RA35T |
K3500 | 1 |
G-40 | 1 ½” | 4 SMALL 6 LARGE | BUNA-N | CA40T
RCA40T CA40MM RCA40MM |
K4000 | 2 |
G-45 | 1 ½” | 4 SMALL 6 LARGE | BUNA-N | CA45T2
RCA45T2 CA45DD RCA45DD |
K4501
K4502 |
2 |
G-45FS | 1 ½” | 6 LARGE | BUNA-N | CA45FS
RCA45FS |
K4516 | 1 |
G-50 | 2” | 4 SMALL 8 LARGE | BUNA-N | CA50T
RCA50T |
K5004 | 2 |
PART # | SIZE | BOLT CONFIGURATION | MATERIAL | VALVES USED IN | COMMON KIT REPLACEMENT | # OF SPRINGS |
---|---|---|---|---|---|---|
M-M20 | ¾” | 4 | BUNA-N | VEM206
VNP206 |
DB16 | 0 |
M-M25 | 1” | 4 | BUNA-N | VEM208
VNP208 |
DB18 | 0 |
M-M40 | 1 ½” | 4 SMALL 6 LARGE | BUNA-N | VEM214
VNP214 VEM212 VNP212 |
DB16
DB114 DB112 (LARGE ONLY) |
1 |
M-M50 | 2” | 4 SMALL 6 LARGE | BUNA-N | VEM216
VPN216 |
DB16
DB116 |
1 |
PART # | SIZE | BOLT CONFIGURATION | MATERIAL | VALVES USED IN | COMMON KIT REPLACEMENT | # OF SPRINGS |
---|---|---|---|---|---|---|
TH-20 | ¾” | 5 | BUNA-N | ALL 4820 & 5820
SERIES VALVES |
TSPK1-4820
TSPK1-5820 |
1 |
TH-25 | 1” | 5 | BUNA-N | ALL 4825 & 5825
SERIES VALVES |
TSPK1-4825
TSPK1-5825 |
1 |
TH-40 | 1 ½” | 4 SMALL 6 LARGE | BUNA-N | ALL 4440
SERIES VALVES |
TSPK1-4440 | 2 |